20344533206513 has 8 divisors (see below), whose sum is σ = 20441979092808. Its totient is φ = 20247173904384.

The previous prime is 20344533206479. The next prime is 20344533206527. The reversal of 20344533206513 is 31560233544302.

It can be written as a sum of positive squares in 4 ways, for example, as 776402412769 + 19568130793744 = 881137^2 + 4423588^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20344533206513 - 2³⁸ = 20069655299569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20344533203513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21174956 + ... + 22114877.

It is an arithmetic number, because the mean of its divisors is an integer number (2555247386601).

Almost surely, 2^{20344533206513} is an apocalyptic number.

It is an amenable number.

20344533206513 is a deficient number, since it is larger than the sum of its proper divisors (97445886295).

20344533206513 is a wasteful number, since it uses less digits than its factorization.

20344533206513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43292083.

The product of its (nonzero) digits is 777600, while the sum is 41.

The spelling of 20344533206513 in words is "twenty trillion, three hundred forty-four billion, five hundred thirty-three million, two hundred six thousand, five hundred thirteen".