21970410 has 64 divisors (see below), whose sum is σ = 65746944. Its totient is φ = 4564800.

The previous prime is 21970397. The next prime is 21970427. The reversal of 21970410 is 1407912.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2446 + ... + 7065.

It is an arithmetic number, because the mean of its divisors is an integer number (1027296).

Almost surely, 2^21970410 is an apocalyptic number.

21970410 is an abundant number, since it is smaller than the sum of its proper divisors (43776534).

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

21970410 is a wasteful number, since it uses less digits than its factorization.

21970410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9539.

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 21970410 is about 4687.2603938761. The cubic root of 21970410 is about 280.0782519383.

The spelling of 21970410 in words is "twenty-one million, nine hundred seventy thousand, four hundred ten".