20972246 has 16 divisors (see below), whose sum is σ = 32460480. Its totient is φ = 10161400.

The previous prime is 20972233. The next prime is 20972267. The reversal of 20972246 is 64227902.

It is a Curzon number.

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, 207596 + ... + 207696.

It is an arithmetic number, because the mean of its divisors is an integer number (2028780).

Almost surely, 2^20972246 is an apocalyptic number.

20972246 is a deficient number, since it is larger than the sum of its proper divisors (11488234).

20972246 is an frugal number, since it uses more digits than its factorization.

20972246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244 (or 150 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 20972246 is about 4579.5464840964. The cubic root of 20972246 is about 275.7708224968.

The spelling of 20972246 in words is "twenty million, nine hundred seventy-two thousand, two hundred forty-six".