20976437 has 12 divisors (see below), whose sum is σ = 23093280. Its totient is φ = 18999288.

The previous prime is 20976433. The next prime is 20976457. The reversal of 20976437 is 73467902.

It is not a de Polignac number, because 20976437 - 2² = 20976433 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20976437.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20976433) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9008 + ... + 11094.

It is an arithmetic number, because the mean of its divisors is an integer number (1924440).

Almost surely, 2^20976437 is an apocalyptic number.

It is an amenable number.

20976437 is a deficient number, since it is larger than the sum of its proper divisors (2116843).

20976437 is a wasteful number, since it uses less digits than its factorization.

20976437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2152 (or 2129 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 38.

The square root of 20976437 is about 4580.0040392995. The cubic root of 20976437 is about 275.7891908766.

The spelling of 20976437 in words is "twenty million, nine hundred seventy-six thousand, four hundred thirty-seven".