21085232 has 20 divisors (see below), whose sum is σ = 46688976. Its totient is φ = 9036480.

The previous prime is 21085223. The next prime is 21085241. The reversal of 21085232 is 23258012.

It is an interprime number because it is at equal distance from previous prime (21085223) and next prime (21085241).

It is a junction number, because it is equal to n+sod(n) for n = 21085198 and 21085207.

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, 94019 + ... + 94242.

Almost surely, 2^21085232 is an apocalyptic number.

It is an amenable number.

21085232 is an abundant number, since it is smaller than the sum of its proper divisors (25603744).

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

21085232 is a wasteful number, since it uses less digits than its factorization.

21085232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188276 (or 188270 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 21085232 is about 4591.8658516991. The cubic root of 21085232 is about 276.2651655918.

The spelling of 21085232 in words is "twenty-one million, eighty-five thousand, two hundred thirty-two".