21954832 has 20 divisors (see below), whose sum is σ = 42649180. Its totient is φ = 10948608.

The previous prime is 21954809. The next prime is 21954841. The reversal of 21954832 is 23845912.

It can be written as a sum of positive squares in 2 ways, for example, as 10010896 + 11943936 = 3164^2 + 3456^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5344 + ... + 8512.

It is an arithmetic number, because the mean of its divisors is an integer number (2132459).

Almost surely, 2^21954832 is an apocalyptic number.

It is an amenable number.

21954832 is a deficient number, since it is larger than the sum of its proper divisors (20694348).

21954832 is a wasteful number, since it uses less digits than its factorization.

21954832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3610 (or 3604 counting only the distinct ones).

The product of its digits is 17280, while the sum is 34.

The square root of 21954832 is about 4685.5983609353. The cubic root of 21954832 is about 280.0120402986.

The spelling of 21954832 in words is "twenty-one million, nine hundred fifty-four thousand, eight hundred thirty-two".