20972384 has 12 divisors (see below), whose sum is σ = 41289444. Its totient is φ = 10486176.

The previous prime is 20972383. The next prime is 20972417. The reversal of 20972384 is 48327902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20972381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327662 + ... + 327725.

It is an arithmetic number, because the mean of its divisors is an integer number (3440787).

Almost surely, 2^20972384 is an apocalyptic number.

It is an amenable number.

20972384 is a deficient number, since it is larger than the sum of its proper divisors (20317060).

20972384 is an equidigital number, since it uses as much as digits as its factorization.

20972384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655397 (or 655389 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 20972384 is about 4579.5615510658. The cubic root of 20972384 is about 275.7714273643.

The spelling of 20972384 in words is "twenty million, nine hundred seventy-two thousand, three hundred eighty-four".