20512070420 has 24 divisors (see below), whose sum is σ = 43081907400. Its totient is φ = 8203578752.

The previous prime is 20512070401. The next prime is 20512070437. The reversal of 20512070420 is 2407021502.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 112232836 + 20399837584 = 10594^2 + 142828^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62726 + ... + 212034.

It is an arithmetic number, because the mean of its divisors is an integer number (1795079475).

Almost surely, 2^20512070420 is an apocalyptic number.

20512070420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20512070420 is an abundant number, since it is smaller than the sum of its proper divisors (22569836980).

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

20512070420 is a wasteful number, since it uses less digits than its factorization.

20512070420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156187 (or 156185 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 23.

Adding to 20512070420 its reverse (2407021502), we get a palindrome (22919091922).

The spelling of 20512070420 in words is "twenty billion, five hundred twelve million, seventy thousand, four hundred twenty".