1520422020 has 216 divisors, whose sum is σ = 5042261952. Its totient is φ = 370656000.

The previous prime is 1520422003. The next prime is 1520422031. The reversal of 1520422020 is 202240251.

1520422020 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1520421984 and 1520422002.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 4593255 + ... + 4593585.

Almost surely, 2^1520422020 is an apocalyptic number.

1520422020 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 1520422020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2521130976).

1520422020 is an abundant number, since it is smaller than the sum of its proper divisors (3521839932).

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

1520422020 is a wasteful number, since it uses less digits than its factorization.

1520422020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523 (or 505 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 1520422020 is about 38992.5892959162. The cubic root of 1520422020 is about 1149.8858160102.

Adding to 1520422020 its reverse (202240251), we get a palindrome (1722662271).

The spelling of 1520422020 in words is "one billion, five hundred twenty million, four hundred twenty-two thousand, twenty".