21874674 has 16 divisors (see below), whose sum is σ = 44366400. Its totient is φ = 7188720.

The previous prime is 21874673. The next prime is 21874691. The reversal of 21874674 is 47647812.

It is not an unprimeable number, because it can be changed into a prime (21874673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25249 + ... + 26100.

It is an arithmetic number, because the mean of its divisors is an integer number (2772900).

Almost surely, 2^21874674 is an apocalyptic number.

21874674 is an abundant number, since it is smaller than the sum of its proper divisors (22491726).

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

21874674 is a wasteful number, since it uses less digits than its factorization.

21874674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51425.

The product of its digits is 75264, while the sum is 39.

The square root of 21874674 is about 4677.0368824716. The cubic root of 21874674 is about 279.6708462083.

The spelling of 21874674 in words is "twenty-one million, eight hundred seventy-four thousand, six hundred seventy-four".