20976500 has 24 divisors (see below), whose sum is σ = 45813768. Its totient is φ = 8390400.

The previous prime is 20976479. The next prime is 20976509. The reversal of 20976500 is 567902.

It can be written as a sum of positive squares in 4 ways, for example, as 1669264 + 19307236 = 1292^2 + 4394^2 .

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20976509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20477 + ... + 21476.

It is an arithmetic number, because the mean of its divisors is an integer number (1908907).

Almost surely, 2^20976500 is an apocalyptic number.

20976500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20976500 is an abundant number, since it is smaller than the sum of its proper divisors (24837268).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20976500 is a wasteful number, since it uses less digits than its factorization.

20976500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41972 (or 41960 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 20976500 is about 4580.0109170176. The cubic root of 20976500 is about 275.7894669753.

The spelling of 20976500 in words is "twenty million, nine hundred seventy-six thousand, five hundred".