20251104539987 has 2 divisors, whose sum is σ = 20251104539988. Its totient is φ = 20251104539986.

The previous prime is 20251104539983. The next prime is 20251104540013. The reversal of 20251104539987 is 78993540115202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20251104539987 - 2² = 20251104539983 is a prime.

It is a super-3 number, since 3×20251104539987³ (a number of 41 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (20251104539983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10125552269993 + 10125552269994.

It is an arithmetic number, because the mean of its divisors is an integer number (10125552269994).

Almost surely, 2^{20251104539987} is an apocalyptic number.

20251104539987 is a deficient number, since it is larger than the sum of its proper divisors (1).

20251104539987 is an equidigital number, since it uses as much as digits as its factorization.

20251104539987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5443200, while the sum is 56.

The spelling of 20251104539987 in words is "twenty trillion, two hundred fifty-one billion, one hundred four million, five hundred thirty-nine thousand, nine hundred eighty-seven".