21472974 has 24 divisors (see below), whose sum is σ = 46963800. Its totient is φ = 7090128.

The previous prime is 21472973. The next prime is 21472993. The reversal of 21472974 is 47927412.

It is a super-2 number, since 2×21472974² = 922177224809352, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21472973) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3649 + ... + 7500.

It is an arithmetic number, because the mean of its divisors is an integer number (1956825).

Almost surely, 2^21472974 is an apocalyptic number.

21472974 is an abundant number, since it is smaller than the sum of its proper divisors (25490826).

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

21472974 is a wasteful number, since it uses less digits than its factorization.

21472974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11264 (or 11261 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 21472974 is about 4633.8940428111. The cubic root of 21472974 is about 277.9483281290.

The spelling of 21472974 in words is "twenty-one million, four hundred seventy-two thousand, nine hundred seventy-four".