20957673 has 16 divisors (see below), whose sum is σ = 30873600. Its totient is φ = 12539280.

The previous prime is 20957663. The next prime is 20957689. The reversal of 20957673 is 37675902.

It is not a de Polignac number, because 20957673 - 2⁶ = 20957609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20957603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1413 + ... + 6626.

It is an arithmetic number, because the mean of its divisors is an integer number (1929600).

Almost surely, 2^20957673 is an apocalyptic number.

It is an amenable number.

20957673 is a deficient number, since it is larger than the sum of its proper divisors (9915927).

20957673 is a wasteful number, since it uses less digits than its factorization.

20957673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8132.

The product of its (nonzero) digits is 79380, while the sum is 39.

The square root of 20957673 is about 4577.9551111823. The cubic root of 20957673 is about 275.7069326714.

The spelling of 20957673 in words is "twenty million, nine hundred fifty-seven thousand, six hundred seventy-three".