21992932 has 24 divisors (see below), whose sum is σ = 41576696. Its totient is φ = 10119168.

The previous prime is 21992923. The next prime is 21992941. The reversal of 21992932 is 23929912.

It is an interprime number because it is at equal distance from previous prime (21992923) and next prime (21992941).

It can be written as a sum of positive squares in 4 ways, for example, as 12787776 + 9205156 = 3576^2 + 3034^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21992891 and 21992900.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29638 + ... + 30370.

Almost surely, 2^21992932 is an apocalyptic number.

It is an amenable number.

21992932 is a deficient number, since it is larger than the sum of its proper divisors (19583764).

21992932 is a wasteful number, since it uses less digits than its factorization.

21992932 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1327 (or 1325 counting only the distinct ones).

The product of its digits is 17496, while the sum is 37.

The square root of 21992932 is about 4689.6622479663. The cubic root of 21992932 is about 280.1739225575.

It can be divided in two parts, 219929 and 32, that added together give a square (219961 = 469²).

The spelling of 21992932 in words is "twenty-one million, nine hundred ninety-two thousand, nine hundred thirty-two".