20372051501 has 2 divisors, whose sum is σ = 20372051502. Its totient is φ = 20372051500.

The previous prime is 20372051467. The next prime is 20372051537. The reversal of 20372051501 is 10515027302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19202753476 + 1169298025 = 138574^2 + 34195^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20372051501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20372059501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10186025750 + 10186025751.

It is an arithmetic number, because the mean of its divisors is an integer number (10186025751).

Almost surely, 2^20372051501 is an apocalyptic number.

It is an amenable number.

20372051501 is a deficient number, since it is larger than the sum of its proper divisors (1).

20372051501 is an equidigital number, since it uses as much as digits as its factorization.

20372051501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2100, while the sum is 26.

Adding to 20372051501 its reverse (10515027302), we get a palindrome (30887078803).

The spelling of 20372051501 in words is "twenty billion, three hundred seventy-two million, fifty-one thousand, five hundred one".