20364342321757 has 6 divisors (see below), whose sum is σ = 23689132904958. Its totient is φ = 17455150561464.

The previous prime is 20364342321737. The next prime is 20364342321787. The reversal of 20364342321757 is 75712324346302.

It can be written as a sum of positive squares in only one way, i.e., 19022106536356 + 1342235785401 = 4361434^2 + 1158549^2 .

It is not a de Polignac number, because 20364342321757 - 2²⁷ = 20364208104029 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49), and also a Moran number because the ratio is a prime number: 415598822893 = 20364342321757 / (2 + 0 + 3 + 6 + 4 + 3 + 4 + 2 + 3 + 2 + 1 + 7 + 5 + 7).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20364342321757.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20364342321737) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 207799411398 + ... + 207799411495.

It is an arithmetic number, because the mean of its divisors is an integer number (3948188817493).

Almost surely, 2^{20364342321757} is an apocalyptic number.

It is an amenable number.

20364342321757 is a deficient number, since it is larger than the sum of its proper divisors (3324790583201).

20364342321757 is an equidigital number, since it uses as much as digits as its factorization.

20364342321757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415598822907 (or 415598822900 counting only the distinct ones).

The product of its (nonzero) digits is 5080320, while the sum is 49.

The spelling of 20364342321757 in words is "twenty trillion, three hundred sixty-four billion, three hundred forty-two million, three hundred twenty-one thousand, seven hundred fifty-seven".