20464446046440 has 64 divisors (see below), whose sum is σ = 66974550701760. Its totient is φ = 4961077829120.

The previous prime is 20464446046397. The next prime is 20464446046469. The reversal of 20464446046440 is 4464064446402.

It is a self number, because there is not a number n which added to its sum of digits gives 20464446046440.

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, 7751682789 + ... + 7751685428.

It is an arithmetic number, because the mean of its divisors is an integer number (1046477354715).

Almost surely, 2^{20464446046440} is an apocalyptic number.

20464446046440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20464446046440 is an abundant number, since it is smaller than the sum of its proper divisors (46510104655320).

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

20464446046440 is a wasteful number, since it uses less digits than its factorization.

20464446046440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15503368242 (or 15503368238 counting only the distinct ones).

The product of its (nonzero) digits is 7077888, while the sum is 48.

The spelling of 20464446046440 in words is "twenty trillion, four hundred sixty-four billion, four hundred forty-six million, forty-six thousand, four hundred forty".