21192332 has 12 divisors (see below), whose sum is σ = 42384720. Its totient is φ = 9082416.

The previous prime is 21192299. The next prime is 21192337. The reversal of 21192332 is 23329112.

21192332 is an admirable number.

It is a super-2 number, since 2×21192332² = 898229871196448, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21192298 and 21192307.

It is not an unprimeable number, because it can be changed into a prime (21192337) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 378407 + ... + 378462.

It is an arithmetic number, because the mean of its divisors is an integer number (3532060).

It is a self-describing number.

Almost surely, 2^21192332 is an apocalyptic number.

It is an amenable number.

21192332 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21192332 is a wasteful number, since it uses less digits than its factorization.

21192332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756880 (or 756878 counting only the distinct ones).

The product of its digits is 648, while the sum is 23.

The square root of 21192332 is about 4603.5130063898. The cubic root of 21192332 is about 276.7321281852.

The spelling of 21192332 in words is "twenty-one million, one hundred ninety-two thousand, three hundred thirty-two".