20516757516 has 48 divisors (see below), whose sum is σ = 53458944000. Its totient is φ = 6804545616.

The previous prime is 20516757509. The next prime is 20516757523. The reversal of 20516757516 is 61575761502.

20516757516 is a `hidden beast` number, since 2 + 0 + 5 + 1 + 67 + 575 + 16 = 666.

It is an interprime number because it is at equal distance from previous prime (20516757509) and next prime (20516757523).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 455820 + ... + 498803.

It is an arithmetic number, because the mean of its divisors is an integer number (1113728000).

Almost surely, 2^20516757516 is an apocalyptic number.

It is an amenable number.

20516757516 is an abundant number, since it is smaller than the sum of its proper divisors (32942186484).

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

20516757516 is a wasteful number, since it uses less digits than its factorization.

20516757516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 954835 (or 954827 counting only the distinct ones).

The product of its (nonzero) digits is 441000, while the sum is 45.

The spelling of 20516757516 in words is "twenty billion, five hundred sixteen million, seven hundred fifty-seven thousand, five hundred sixteen".