15553972020 has 48 divisors (see below), whose sum is σ = 43621583040. Its totient is φ = 4141015296.

The previous prime is 15553972009. The next prime is 15553972037. The reversal of 15553972020 is 2027935551.

It is a self number, because there is not a number n which added to its sum of digits gives 15553972020.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 172257 + ... + 246536.

It is an arithmetic number, because the mean of its divisors is an integer number (908782980).

Almost surely, 2^15553972020 is an apocalyptic number.

15553972020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15553972020 is an abundant number, since it is smaller than the sum of its proper divisors (28067611020).

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

15553972020 is a wasteful number, since it uses less digits than its factorization.

15553972020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419424 (or 419422 counting only the distinct ones).

The product of its (nonzero) digits is 94500, while the sum is 39.

The spelling of 15553972020 in words is "fifteen billion, five hundred fifty-three million, nine hundred seventy-two thousand, twenty".