20465005 has 16 divisors (see below), whose sum is σ = 26878464. Its totient is φ = 14834880.

The previous prime is 20464987. The next prime is 20465041. The reversal of 20465005 is 50056402.

It is not a de Polignac number, because 20465005 - 2⁵ = 20464973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33079 + ... + 33691.

It is an arithmetic number, because the mean of its divisors is an integer number (1679904).

Almost surely, 2^20465005 is an apocalyptic number.

It is an amenable number.

20465005 is a deficient number, since it is larger than the sum of its proper divisors (6413459).

20465005 is a wasteful number, since it uses less digits than its factorization.

20465005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1236.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 20465005 is about 4523.8263671366. The cubic root of 20465005 is about 273.5293614948.

The spelling of 20465005 in words is "twenty million, four hundred sixty-five thousand, five".