20965413 has 8 divisors (see below), whose sum is σ = 31947328. Its totient is φ = 11980224.

The previous prime is 20965409. The next prime is 20965423. The reversal of 20965413 is 31456902.

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

It is not a de Polignac number, because 20965413 - 2² = 20965409 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20965423) 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, 499156 + ... + 499197.

It is an arithmetic number, because the mean of its divisors is an integer number (3993416).

Almost surely, 2^20965413 is an apocalyptic number.

It is an amenable number.

20965413 is a deficient number, since it is larger than the sum of its proper divisors (10981915).

20965413 is an equidigital number, since it uses as much as digits as its factorization.

20965413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 998363.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 20965413 is about 4578.8003887481. The cubic root of 20965413 is about 275.7408694704.

The spelling of 20965413 in words is "twenty million, nine hundred sixty-five thousand, four hundred thirteen".