20957268 has 12 divisors (see below), whose sum is σ = 48900320. Its totient is φ = 6985752.

The previous prime is 20957263. The next prime is 20957303. The reversal of 20957268 is 86275902.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (39) 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 (20957263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 873208 + ... + 873231.

Almost surely, 2^20957268 is an apocalyptic number.

It is an amenable number.

20957268 is an abundant number, since it is smaller than the sum of its proper divisors (27943052).

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

20957268 is a wasteful number, since it uses less digits than its factorization.

20957268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1746446 (or 1746444 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 20957268 is about 4577.9108772452. The cubic root of 20957268 is about 275.7051566786.

The spelling of 20957268 in words is "twenty million, nine hundred fifty-seven thousand, two hundred sixty-eight".