18621739151 has 2 divisors, whose sum is σ = 18621739152. Its totient is φ = 18621739150.

The previous prime is 18621739099. The next prime is 18621739163. The reversal of 18621739151 is 15193712681.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18621739151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18621739651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9310869575 + 9310869576.

It is an arithmetic number, because the mean of its divisors is an integer number (9310869576).

Almost surely, 2^18621739151 is an apocalyptic number.

18621739151 is a deficient number, since it is larger than the sum of its proper divisors (1).

18621739151 is an equidigital number, since it uses as much as digits as its factorization.

18621739151 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 44.

The spelling of 18621739151 in words is "eighteen billion, six hundred twenty-one million, seven hundred thirty-nine thousand, one hundred fifty-one".