20464604490 has 64 divisors (see below), whose sum is σ = 53643606912. Its totient is φ = 4955232000.

The previous prime is 20464604483. The next prime is 20464604509. The reversal of 20464604490 is 9440646402.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 245140 + ... + 317840.

It is an arithmetic number, because the mean of its divisors is an integer number (838181358).

Almost surely, 2^20464604490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20464604490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26821803456).

20464604490 is an abundant number, since it is smaller than the sum of its proper divisors (33179002422).

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

20464604490 is a wasteful number, since it uses less digits than its factorization.

20464604490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73575.

The product of its (nonzero) digits is 165888, while the sum is 39.

The spelling of 20464604490 in words is "twenty billion, four hundred sixty-four million, six hundred four thousand, four hundred ninety".