21574485 has 16 divisors (see below), whose sum is σ = 38354880. Its totient is φ = 11506320.

The previous prime is 21574477. The next prime is 21574489. The reversal of 21574485 is 58447512.

21574485 is a `hidden beast` number, since 2 + 1 + 574 + 4 + 85 = 666.

It is not a de Polignac number, because 21574485 - 2³ = 21574477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21574489) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79771 + ... + 80040.

It is an arithmetic number, because the mean of its divisors is an integer number (2397180).

Almost surely, 2^21574485 is an apocalyptic number.

It is an amenable number.

21574485 is a deficient number, since it is larger than the sum of its proper divisors (16780395).

21574485 is a wasteful number, since it uses less digits than its factorization.

21574485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159825 (or 159819 counting only the distinct ones).

The product of its digits is 44800, while the sum is 36.

The square root of 21574485 is about 4644.8342273971. The cubic root of 21574485 is about 278.3856292746.

The spelling of 21574485 in words is "twenty-one million, five hundred seventy-four thousand, four hundred eighty-five".