20321752379 has 18 divisors (see below), whose sum is σ = 21055253940. Its totient is φ = 19608103152.

The previous prime is 20321752351. The next prime is 20321752457. The reversal of 20321752379 is 97325712302.

It is a de Polignac number, because none of the positive numbers 2^k-20321752379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20321752079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 73363589 + ... + 73363865.

It is an arithmetic number, because the mean of its divisors is an integer number (1169736330).

Almost surely, 2^20321752379 is an apocalyptic number.

20321752379 is a deficient number, since it is larger than the sum of its proper divisors (733501561).

20321752379 is an frugal number, since it uses more digits than its factorization.

20321752379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 747 (or 403 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 41.

The spelling of 20321752379 in words is "twenty billion, three hundred twenty-one million, seven hundred fifty-two thousand, three hundred seventy-nine".