21860674 has 16 divisors (see below), whose sum is σ = 37876896. Its totient is φ = 9352000.

The previous prime is 21860651. The next prime is 21860689. The reversal of 21860674 is 47606812.

It is a Harshad number since it is a multiple of its sum of digits (34).

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, 28852 + ... + 29599.

It is an arithmetic number, because the mean of its divisors is an integer number (2367306).

Almost surely, 2^21860674 is an apocalyptic number.

21860674 is a deficient number, since it is larger than the sum of its proper divisors (16016222).

21860674 is a wasteful number, since it uses less digits than its factorization.

21860674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58481.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 21860674 is about 4675.5399688164. The cubic root of 21860674 is about 279.6111694723.

The spelling of 21860674 in words is "twenty-one million, eight hundred sixty thousand, six hundred seventy-four".