15505071020 has 24 divisors (see below), whose sum is σ = 32613277200. Its totient is φ = 6192004032.

The previous prime is 15505071019. The next prime is 15505071031. The reversal of 15505071020 is 2017050551.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 613835 + ... + 638594.

It is an arithmetic number, because the mean of its divisors is an integer number (1358886550).

Almost surely, 2^15505071020 is an apocalyptic number.

15505071020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15505071020 is an abundant number, since it is smaller than the sum of its proper divisors (17108206180).

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

15505071020 is a wasteful number, since it uses less digits than its factorization.

15505071020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1253057 (or 1253055 counting only the distinct ones).

The product of its (nonzero) digits is 1750, while the sum is 26.

The spelling of 15505071020 in words is "fifteen billion, five hundred five million, seventy-one thousand, twenty".