21967074 has 12 divisors (see below), whose sum is σ = 47595366. Its totient is φ = 7322352.

The previous prime is 21967073. The next prime is 21967079. The reversal of 21967074 is 47076912.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 19053225 + 2913849 = 4365^2 + 1707^2 .

It is not an unprimeable number, because it can be changed into a prime (21967073) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 610179 + ... + 610214.

Almost surely, 2^21967074 is an apocalyptic number.

21967074 is an abundant number, since it is smaller than the sum of its proper divisors (25628292).

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

21967074 is a wasteful number, since it uses less digits than its factorization.

21967074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1220401 (or 1220398 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 21967074 is about 4686.9045221767. The cubic root of 21967074 is about 280.0640754718.

The spelling of 21967074 in words is "twenty-one million, nine hundred sixty-seven thousand, seventy-four".