20613286544 has 20 divisors (see below), whose sum is σ = 40016722620. Its totient is φ = 10286390400.

The previous prime is 20613286543. The next prime is 20613286571. The reversal of 20613286544 is 44568231602.

It can be written as a sum of positive squares in 2 ways, for example, as 15094579600 + 5518706944 = 122860^2 + 74288^2 .

It is not an unprimeable number, because it can be changed into a prime (20613286543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1257407 + ... + 1273694.

It is an arithmetic number, because the mean of its divisors is an integer number (2000836131).

Almost surely, 2^20613286544 is an apocalyptic number.

It is an amenable number.

20613286544 is a deficient number, since it is larger than the sum of its proper divisors (19403436076).

20613286544 is a wasteful number, since it uses less digits than its factorization.

20613286544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2531618 (or 2531612 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 41.

The spelling of 20613286544 in words is "twenty billion, six hundred thirteen million, two hundred eighty-six thousand, five hundred forty-four".