21572094 has 16 divisors (see below), whose sum is σ = 44536320. Its totient is φ = 6958680.

The previous prime is 21572077. The next prime is 21572119. The reversal of 21572094 is 49027512.

It is a congruent number.

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, 57804 + ... + 58175.

It is an arithmetic number, because the mean of its divisors is an integer number (2783520).

Almost surely, 2^21572094 is an apocalyptic number.

21572094 is an abundant number, since it is smaller than the sum of its proper divisors (22964226).

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

21572094 is a wasteful number, since it uses less digits than its factorization.

21572094 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116015.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 21572094 is about 4644.5768375601. The cubic root of 21572094 is about 278.3753448324.

The spelling of 21572094 in words is "twenty-one million, five hundred seventy-two thousand, ninety-four".