20004366366251 has 2 divisors, whose sum is σ = 20004366366252. Its totient is φ = 20004366366250.

The previous prime is 20004366366211. The next prime is 20004366366323. The reversal of 20004366366251 is 15266366340002.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20004366366251 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (20004366366211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10002183183125 + 10002183183126.

It is an arithmetic number, because the mean of its divisors is an integer number (10002183183126).

Almost surely, 2^{20004366366251} is an apocalyptic number.

20004366366251 is a deficient number, since it is larger than the sum of its proper divisors (1).

20004366366251 is an equidigital number, since it uses as much as digits as its factorization.

20004366366251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 933120, while the sum is 44.

The spelling of 20004366366251 in words is "twenty trillion, four billion, three hundred sixty-six million, three hundred sixty-six thousand, two hundred fifty-one".