20148308797 has 2 divisors, whose sum is σ = 20148308798. Its totient is φ = 20148308796.

The previous prime is 20148308783. The next prime is 20148308879. The reversal of 20148308797 is 79780384102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19130762596 + 1017546201 = 138314^2 + 31899^2 .

It is a cyclic number.

It is not a de Polignac number, because 20148308797 - 2⁷ = 20148308669 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20148308797.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20148308707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10074154398 + 10074154399.

It is an arithmetic number, because the mean of its divisors is an integer number (10074154399).

Almost surely, 2^20148308797 is an apocalyptic number.

It is an amenable number.

20148308797 is a deficient number, since it is larger than the sum of its proper divisors (1).

20148308797 is an equidigital number, since it uses as much as digits as its factorization.

20148308797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 677376, while the sum is 49.

The spelling of 20148308797 in words is "twenty billion, one hundred forty-eight million, three hundred eight thousand, seven hundred ninety-seven".