20837972 has 12 divisors (see below), whose sum is σ = 37314816. Its totient is φ = 10176600.

The previous prime is 20837899. The next prime is 20837981. The reversal of 20837972 is 27973802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60404 + ... + 60747.

It is an arithmetic number, because the mean of its divisors is an integer number (3109568).

Almost surely, 2^20837972 is an apocalyptic number.

It is an amenable number.

20837972 is a deficient number, since it is larger than the sum of its proper divisors (16476844).

20837972 is a wasteful number, since it uses less digits than its factorization.

20837972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121198 (or 121196 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 20837972 is about 4564.8627580684. The cubic root of 20837972 is about 275.1810246122.

The spelling of 20837972 in words is "twenty million, eight hundred thirty-seven thousand, nine hundred seventy-two".