20516671674 has 24 divisors (see below), whose sum is σ = 44464736160. Its totient is φ = 6837052488.

The previous prime is 20516671649. The next prime is 20516671691. The reversal of 20516671674 is 47617661502.

20516671674 is a `hidden beast` number, since 2 + 0 + 516 + 6 + 71 + 67 + 4 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 83484 + ... + 219095.

It is an arithmetic number, because the mean of its divisors is an integer number (1852697340).

Almost surely, 2^20516671674 is an apocalyptic number.

20516671674 is an abundant number, since it is smaller than the sum of its proper divisors (23948064486).

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

20516671674 is a wasteful number, since it uses less digits than its factorization.

20516671674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306354 (or 306351 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 45.

The spelling of 20516671674 in words is "twenty billion, five hundred sixteen million, six hundred seventy-one thousand, six hundred seventy-four".