16520475024 has 45 divisors (see below), whose sum is σ = 46238701899. Its totient is φ = 5506310880.

The previous prime is 16520475011. The next prime is 16520475031. The reversal of 16520475024 is 42057402561.

It is a happy number.

The square root of 16520475024 is 128532.

It is a perfect power (a square), and thus also a powerful number.

16520475024 is a `hidden beast` number, since 165 + 2 + 0 + 475 + 0 + 24 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 16520475024.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1537029 + ... + 1547739.

Almost surely, 2^16520475024 is an apocalyptic number.

16520475024 is the 128532-nd square number.

It is an amenable number.

16520475024 is an abundant number, since it is smaller than the sum of its proper divisors (29718226875).

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

16520475024 is an frugal number, since it uses more digits than its factorization.

16520475024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21436 (or 10716 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 36.

Multiplying 16520475024 by its sum of digits (36), we get a square (594737100864 = 771192²).

16520475024 divided by its sum of digits (36) gives a square (458902084 = 21422²).

Adding to 16520475024 its reverse (42057402561), we get a palindrome (58577877585).

The spelling of 16520475024 in words is "sixteen billion, five hundred twenty million, four hundred seventy-five thousand, twenty-four".