20372739833 has 2 divisors, whose sum is σ = 20372739834. Its totient is φ = 20372739832.

The previous prime is 20372739817. The next prime is 20372739841. The reversal of 20372739833 is 33893727302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17501173264 + 2871566569 = 132292^2 + 53587^2 .

It is a cyclic number.

It is not a de Polignac number, because 20372739833 - 2⁴ = 20372739817 is a prime.

It is not a weakly prime, because it can be changed into another prime (20372739533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10186369916 + 10186369917.

It is an arithmetic number, because the mean of its divisors is an integer number (10186369917).

Almost surely, 2^20372739833 is an apocalyptic number.

It is an amenable number.

20372739833 is a deficient number, since it is larger than the sum of its proper divisors (1).

20372739833 is an equidigital number, since it uses as much as digits as its factorization.

20372739833 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1143072, while the sum is 47.

The spelling of 20372739833 in words is "twenty billion, three hundred seventy-two million, seven hundred thirty-nine thousand, eight hundred thirty-three".