20654913 has 4 divisors (see below), whose sum is σ = 27539888. Its totient is φ = 13769940.

The previous prime is 20654903. The next prime is 20654923. The reversal of 20654913 is 31945602.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (20654903) and next prime (20654923).

It is not a de Polignac number, because 20654913 - 2¹⁶ = 20589377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20654903) 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, 3442483 + ... + 3442488.

It is an arithmetic number, because the mean of its divisors is an integer number (6884972).

Almost surely, 2^20654913 is an apocalyptic number.

It is an amenable number.

20654913 is a deficient number, since it is larger than the sum of its proper divisors (6884975).

20654913 is an equidigital number, since it uses as much as digits as its factorization.

20654913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6884974.

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

The square root of 20654913 is about 4544.7676508266. The cubic root of 20654913 is about 274.3728429875.

The spelling of 20654913 in words is "twenty million, six hundred fifty-four thousand, nine hundred thirteen".