20957363 has 4 divisors (see below), whose sum is σ = 23951280. Its totient is φ = 17963448.

The previous prime is 20957359. The next prime is 20957369. The reversal of 20957363 is 36375902.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20957363 - 2² = 20957359 is a prime.

It is a super-2 number, since 2×20957363² = 878422127827538, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20957369) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1496948 + ... + 1496961.

It is an arithmetic number, because the mean of its divisors is an integer number (5987820).

Almost surely, 2^20957363 is an apocalyptic number.

20957363 is a deficient number, since it is larger than the sum of its proper divisors (2993917).

20957363 is an equidigital number, since it uses as much as digits as its factorization.

20957363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2993916.

The product of its (nonzero) digits is 34020, while the sum is 35.

The square root of 20957363 is about 4577.9212531454. The cubic root of 20957363 is about 275.7055732716.

The spelling of 20957363 in words is "twenty million, nine hundred fifty-seven thousand, three hundred sixty-three".