20372556097 has 2 divisors, whose sum is σ = 20372556098. Its totient is φ = 20372556096.

The previous prime is 20372556077. The next prime is 20372556119. The reversal of 20372556097 is 79065527302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18642079296 + 1730476801 = 136536^2 + 41599^2 .

It is a cyclic number.

It is not a de Polignac number, because 20372556097 - 2²³ = 20364167489 is a prime.

It is not a weakly prime, because it can be changed into another prime (20372556007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10186278048 + 10186278049.

It is an arithmetic number, because the mean of its divisors is an integer number (10186278049).

Almost surely, 2^20372556097 is an apocalyptic number.

It is an amenable number.

20372556097 is a deficient number, since it is larger than the sum of its proper divisors (1).

20372556097 is an equidigital number, since it uses as much as digits as its factorization.

20372556097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 793800, while the sum is 46.

The spelling of 20372556097 in words is "twenty billion, three hundred seventy-two million, five hundred fifty-six thousand, ninety-seven".