1520020000000 has 144 divisors (see below), whose sum is σ = 3792668220432. Its totient is φ = 608000000000.

The previous prime is 1520019999983. The next prime is 1520020000003. The reversal of 1520020000000 is 200251.

It can be written as a sum of positive squares in 8 ways, for example, as 1307491623936 + 212528376064 = 1143456^2 + 461008^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1520020000003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19962000 + ... + 20038000.

It is an arithmetic number, because the mean of its divisors is an integer number (26337973753).

Almost surely, 2^{1520020000000} is an apocalyptic number.

1520020000000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1520020000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1896334110216).

1520020000000 is an abundant number, since it is smaller than the sum of its proper divisors (2272648220432).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1520020000000 is an frugal number, since it uses more digits than its factorization.

1520020000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76052 (or 76008 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 10.

Adding to 1520020000000 its reverse (200251), we get a palindrome (1520020200251).

The spelling of 1520020000000 in words is "one trillion, five hundred twenty billion, twenty million", and thus it is an aban number.