20973530 has 32 divisors (see below), whose sum is σ = 40037760. Its totient is φ = 7888320.

The previous prime is 20973527. The next prime is 20973553. The reversal of 20973530 is 3537902.

It is a junction number, because it is equal to n+sod(n) for n = 20973493 and 20973502.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31400 + ... + 32060.

It is an arithmetic number, because the mean of its divisors is an integer number (1251180).

Almost surely, 2^20973530 is an apocalyptic number.

20973530 is a deficient number, since it is larger than the sum of its proper divisors (19064230).

20973530 is a wasteful number, since it uses less digits than its factorization.

20973530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 854.

The product of its (nonzero) digits is 5670, while the sum is 29.

The square root of 20973530 is about 4579.6866705049. The cubic root of 20973530 is about 275.7764502919.

The spelling of 20973530 in words is "twenty million, nine hundred seventy-three thousand, five hundred thirty".