20887423674 has 32 divisors (see below), whose sum is σ = 45133006464. Its totient is φ = 6406226880.

The previous prime is 20887423651. The next prime is 20887423703. The reversal of 20887423674 is 47632478802.

It is a Curzon number.

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, 406269 + ... + 454784.

It is an arithmetic number, because the mean of its divisors is an integer number (1410406452).

Almost surely, 2^20887423674 is an apocalyptic number.

20887423674 is an abundant number, since it is smaller than the sum of its proper divisors (24245582790).

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

20887423674 is a wasteful number, since it uses less digits than its factorization.

20887423674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861382.

The product of its (nonzero) digits is 3612672, while the sum is 51.

The spelling of 20887423674 in words is "twenty billion, eight hundred eighty-seven million, four hundred twenty-three thousand, six hundred seventy-four".