20977232 has 20 divisors (see below), whose sum is σ = 40726560. Its totient is φ = 10467168.

The previous prime is 20977217. The next prime is 20977247. The reversal of 20977232 is 23277902.

It is an interprime number because it is at equal distance from previous prime (20977217) and next prime (20977247).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9269 + ... + 11307.

It is an arithmetic number, because the mean of its divisors is an integer number (2036328).

Almost surely, 2^20977232 is an apocalyptic number.

It is an amenable number.

20977232 is a deficient number, since it is larger than the sum of its proper divisors (19749328).

20977232 is a wasteful number, since it uses less digits than its factorization.

20977232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2690 (or 2684 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 20977232 is about 4580.0908287937. The cubic root of 20977232 is about 275.7926749388.

The spelling of 20977232 in words is "twenty million, nine hundred seventy-seven thousand, two hundred thirty-two".