21596974 has 32 divisors (see below), whose sum is σ = 38402496. Its totient is φ = 8916480.

The previous prime is 21596969. The next prime is 21596983. The reversal of 21596974 is 47969512.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21596974.

It is a congruent 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, 89494 + ... + 89734.

It is an arithmetic number, because the mean of its divisors is an integer number (1200078).

Almost surely, 2^21596974 is an apocalyptic number.

21596974 is a deficient number, since it is larger than the sum of its proper divisors (16805522).

21596974 is a wasteful number, since it uses less digits than its factorization.

21596974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460.

The product of its digits is 136080, while the sum is 43.

The square root of 21596974 is about 4647.2544582796. The cubic root of 21596974 is about 278.4823243651.

The spelling of 21596974 in words is "twenty-one million, five hundred ninety-six thousand, nine hundred seventy-four".