21625602 has 16 divisors (see below), whose sum is σ = 43306752. Its totient is φ = 7199280.

The previous prime is 21625577. The next prime is 21625607. The reversal of 21625602 is 20652612.

It is not an unprimeable number, because it can be changed into a prime (21625607) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4128 + ... + 7764.

It is an arithmetic number, because the mean of its divisors is an integer number (2706672).

Almost surely, 2^21625602 is an apocalyptic number.

21625602 is an abundant number, since it is smaller than the sum of its proper divisors (21681150).

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

21625602 is a wasteful number, since it uses less digits than its factorization.

21625602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4633.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 21625602 is about 4650.3335364251. Note that the first 3 decimals coincide. The cubic root of 21625602 is about 278.6053180147.

The spelling of 21625602 in words is "twenty-one million, six hundred twenty-five thousand, six hundred two".