20613302645 has 12 divisors (see below), whose sum is σ = 26785097316. Its totient is φ = 15222130560.

The previous prime is 20613302623. The next prime is 20613302659. The reversal of 20613302645 is 54620331602.

It can be written as a sum of positive squares in 6 ways, for example, as 9950262001 + 10663040644 = 99751^2 + 103262^2 .

It is not a de Polignac number, because 20613302645 - 2⁸ = 20613302389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12196376 + ... + 12198065.

It is an arithmetic number, because the mean of its divisors is an integer number (2232091443).

Almost surely, 2^20613302645 is an apocalyptic number.

It is an amenable number.

20613302645 is a deficient number, since it is larger than the sum of its proper divisors (6171794671).

20613302645 is a wasteful number, since it uses less digits than its factorization.

20613302645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24394472 (or 24394459 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 32.

The spelling of 20613302645 in words is "twenty billion, six hundred thirteen million, three hundred two thousand, six hundred forty-five".