20500167551 has 2 divisors, whose sum is σ = 20500167552. Its totient is φ = 20500167550.

The previous prime is 20500167539. The next prime is 20500167601. The reversal of 20500167551 is 15576100502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20500167551 - 2²² = 20495973247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20500157551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10250083775 + 10250083776.

It is an arithmetic number, because the mean of its divisors is an integer number (10250083776).

Almost surely, 2^20500167551 is an apocalyptic number.

20500167551 is a deficient number, since it is larger than the sum of its proper divisors (1).

20500167551 is an equidigital number, since it uses as much as digits as its factorization.

20500167551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10500, while the sum is 32.

The spelling of 20500167551 in words is "twenty billion, five hundred million, one hundred sixty-seven thousand, five hundred fifty-one".