20625992 has 8 divisors (see below), whose sum is σ = 38673750. Its totient is φ = 10312992.

The previous prime is 20625977. The next prime is 20626007. The reversal of 20625992 is 29952602.

It is an interprime number because it is at equal distance from previous prime (20625977) and next prime (20626007).

It can be written as a sum of positive squares in only one way, i.e., 16760836 + 3865156 = 4094^2 + 1966^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1289117 + ... + 1289132.

Almost surely, 2^20625992 is an apocalyptic number.

It is an amenable number.

20625992 is a deficient number, since it is larger than the sum of its proper divisors (18047758).

20625992 is a wasteful number, since it uses less digits than its factorization.

20625992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2578255 (or 2578251 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 20625992 is about 4541.5847454385. The cubic root of 20625992 is about 274.2447242607.

The spelling of 20625992 in words is "twenty million, six hundred twenty-five thousand, nine hundred ninety-two".