20620356464597 has 2 divisors, whose sum is σ = 20620356464598. Its totient is φ = 20620356464596.

The previous prime is 20620356464497. The next prime is 20620356464627. The reversal of 20620356464597 is 79546465302602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17228401805521 + 3391954659076 = 4150711^2 + 1841726^2 .

It is a cyclic number.

It is not a de Polignac number, because 20620356464597 - 2²² = 20620352270293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20620356464497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10310178232298 + 10310178232299.

It is an arithmetic number, because the mean of its divisors is an integer number (10310178232299).

Almost surely, 2^{20620356464597} is an apocalyptic number.

It is an amenable number.

20620356464597 is a deficient number, since it is larger than the sum of its proper divisors (1).

20620356464597 is an equidigital number, since it uses as much as digits as its factorization.

20620356464597 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 65318400, while the sum is 59.

The spelling of 20620356464597 in words is "twenty trillion, six hundred twenty billion, three hundred fifty-six million, four hundred sixty-four thousand, five hundred ninety-seven".