20965953 has 8 divisors (see below), whose sum is σ = 27995968. Its totient is φ = 13956624.

The previous prime is 20965921. The next prime is 20965979. The reversal of 20965953 is 35956902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20965953 - 2⁵ = 20965921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20965993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2626 + ... + 6987.

It is an arithmetic number, because the mean of its divisors is an integer number (3499496).

Almost surely, 2^20965953 is an apocalyptic number.

It is an amenable number.

20965953 is a deficient number, since it is larger than the sum of its proper divisors (7030015).

20965953 is an equidigital number, since it uses as much as digits as its factorization.

20965953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10343.

The product of its (nonzero) digits is 72900, while the sum is 39.

The square root of 20965953 is about 4578.8593557785. The cubic root of 20965953 is about 275.7432368423.

The spelling of 20965953 in words is "twenty million, nine hundred sixty-five thousand, nine hundred fifty-three".