21162854874 has 32 divisors (see below), whose sum is σ = 48376567296. Its totient is φ = 6045989040.

The previous prime is 21162854857. The next prime is 21162854899. The reversal of 21162854874 is 47845826112.

It is a happy 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, 849009 + ... + 873579.

It is an arithmetic number, because the mean of its divisors is an integer number (1511767728).

Almost surely, 2^21162854874 is an apocalyptic number.

21162854874 is an abundant number, since it is smaller than the sum of its proper divisors (27213712422).

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

21162854874 is a wasteful number, since it uses less digits than its factorization.

21162854874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45090.

The product of its digits is 860160, while the sum is 48.

The spelling of 21162854874 in words is "twenty-one billion, one hundred sixty-two million, eight hundred fifty-four thousand, eight hundred seventy-four".