20511853274 has 16 divisors (see below), whose sum is σ = 33580460736. Its totient is φ = 9319233600.

The previous prime is 20511853267. The next prime is 20511853283. The reversal of 20511853274 is 47235811502.

It is a super-2 number, since 2×20511853274² (a number of 21 digits) contains 22 as substring.

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, 168182 + ... + 263265.

It is an arithmetic number, because the mean of its divisors is an integer number (2098778796).

Almost surely, 2^20511853274 is an apocalyptic number.

20511853274 is a deficient number, since it is larger than the sum of its proper divisors (13068607462).

20511853274 is a wasteful number, since it uses less digits than its factorization.

20511853274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433621.

The product of its (nonzero) digits is 67200, while the sum is 38.

The spelling of 20511853274 in words is "twenty billion, five hundred eleven million, eight hundred fifty-three thousand, two hundred seventy-four".