20943992 has 16 divisors (see below), whose sum is σ = 39809040. Its totient is φ = 10328256.

The previous prime is 20943991. The next prime is 20944019. The reversal of 20943992 is 29934902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20943991) 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, 17348 + ... + 18515.

It is an arithmetic number, because the mean of its divisors is an integer number (2488065).

Almost surely, 2^20943992 is an apocalyptic number.

It is an amenable number.

20943992 is a deficient number, since it is larger than the sum of its proper divisors (18865048).

20943992 is a wasteful number, since it uses less digits than its factorization.

20943992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35942 (or 35938 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 20943992 is about 4576.4606411505. The cubic root of 20943992 is about 275.6469265246.

The spelling of 20943992 in words is "twenty million, nine hundred forty-three thousand, nine hundred ninety-two".