20946537 has 24 divisors (see below), whose sum is σ = 32258304. Its totient is φ = 13066944.

The previous prime is 20946529. The next prime is 20946553. The reversal of 20946537 is 73564902.

It is not a de Polignac number, because 20946537 - 2³ = 20946529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20946517) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8653 + ... + 10805.

It is an arithmetic number, because the mean of its divisors is an integer number (1344096).

Almost surely, 2^20946537 is an apocalyptic number.

It is an amenable number.

20946537 is a deficient number, since it is larger than the sum of its proper divisors (11311767).

20946537 is a wasteful number, since it uses less digits than its factorization.

20946537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2229 (or 2226 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 20946537 is about 4576.7386860078. The cubic root of 20946537 is about 275.6580911108.

The spelling of 20946537 in words is "twenty million, nine hundred forty-six thousand, five hundred thirty-seven".