20464605 has 36 divisors (see below), whose sum is σ = 41267772. Its totient is φ = 9354240.

The previous prime is 20464573. The next prime is 20464637. The reversal of 20464605 is 50646402.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20464573) and next prime (20464637).

It can be written as a sum of positive squares in 2 ways, for example, as 13351716 + 7112889 = 3654^2 + 2667^2 .

It is not a de Polignac number, because 20464605 - 2⁵ = 20464573 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2436 + ... + 6845.

It is an arithmetic number, because the mean of its divisors is an integer number (1146327).

Almost surely, 2^20464605 is an apocalyptic number.

It is an amenable number.

20464605 is an abundant number, since it is smaller than the sum of its proper divisors (20803167).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20464605 is a wasteful number, since it uses less digits than its factorization.

20464605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9306 (or 9296 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 20464605 is about 4523.7821565588. The cubic root of 20464605 is about 273.5275793883.

The spelling of 20464605 in words is "twenty million, four hundred sixty-four thousand, six hundred five".