21374000 has 40 divisors (see below), whose sum is σ = 51687168. Its totient is φ = 8548800.

The previous prime is 21373991. The next prime is 21374011. The reversal of 21374000 is 47312.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 21374000.

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, 3344 + ... + 7343.

Almost surely, 2^21374000 is an apocalyptic number.

21374000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21374000 is an abundant number, since it is smaller than the sum of its proper divisors (30313168).

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

21374000 is a wasteful number, since it uses less digits than its factorization.

21374000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10710 (or 10694 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 21374000 is about 4623.2023533477. The cubic root of 21374000 is about 277.5206272035.

The spelling of 21374000 in words is "twenty-one million, three hundred seventy-four thousand".