20251145631659 has 2 divisors, whose sum is σ = 20251145631660. Its totient is φ = 20251145631658.

The previous prime is 20251145631623. The next prime is 20251145631721. The reversal of 20251145631659 is 95613654115202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20251145631659 - 2⁸ = 20251145631403 is a prime.

It is a super-2 number, since 2×20251145631659² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20251142631659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10125572815829 + 10125572815830.

It is an arithmetic number, because the mean of its divisors is an integer number (10125572815830).

Almost surely, 2^{20251145631659} is an apocalyptic number.

20251145631659 is a deficient number, since it is larger than the sum of its proper divisors (1).

20251145631659 is an equidigital number, since it uses as much as digits as its factorization.

20251145631659 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944000, while the sum is 50.

The spelling of 20251145631659 in words is "twenty trillion, two hundred fifty-one billion, one hundred forty-five million, six hundred thirty-one thousand, six hundred fifty-nine".