20972546 has 16 divisors (see below), whose sum is σ = 36054720. Its totient is φ = 8962800.

The previous prime is 20972537. The next prime is 20972579. The reversal of 20972546 is 64527902.

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, 3521 + ... + 7371.

It is an arithmetic number, because the mean of its divisors is an integer number (2253420).

Almost surely, 2^20972546 is an apocalyptic number.

20972546 is a deficient number, since it is larger than the sum of its proper divisors (15082174).

20972546 is a wasteful number, since it uses less digits than its factorization.

20972546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4249.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 20972546 is about 4579.5792383144. The cubic root of 20972546 is about 275.7721374228.

The spelling of 20972546 in words is "twenty million, nine hundred seventy-two thousand, five hundred forty-six".