20464495 has 12 divisors (see below), whose sum is σ = 25381080. Its totient is φ = 15839760.

The previous prime is 20464471. The next prime is 20464511. The reversal of 20464495 is 59446402.

It is not a de Polignac number, because 20464495 - 2²¹ = 18367343 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20464495.

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 11 ways as a sum of consecutive naturals, for example, 2676 + ... + 6934.

It is an arithmetic number, because the mean of its divisors is an integer number (2115090).

Almost surely, 2^20464495 is an apocalyptic number.

20464495 is a deficient number, since it is larger than the sum of its proper divisors (4916585).

20464495 is an equidigital number, since it uses as much as digits as its factorization.

20464495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4326 (or 4295 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 20464495 is about 4523.7699985742. The cubic root of 20464495 is about 273.5270893049.

The spelling of 20464495 in words is "twenty million, four hundred sixty-four thousand, four hundred ninety-five".