18192909292021 has 2 divisors, whose sum is σ = 18192909292022. Its totient is φ = 18192909292020.

The previous prime is 18192909292001. The next prime is 18192909292027. The reversal of 18192909292021 is 12029290929181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17865626900625 + 327282391396 = 4226775^2 + 572086^2 .

It is a cyclic number.

It is not a de Polignac number, because 18192909292021 - 2⁵ = 18192909291989 is a prime.

It is a super-3 number, since 3×18192909292021³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18192909292027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9096454646010 + 9096454646011.

It is an arithmetic number, because the mean of its divisors is an integer number (9096454646011).

Almost surely, 2^{18192909292021} is an apocalyptic number.

It is an amenable number.

18192909292021 is a deficient number, since it is larger than the sum of its proper divisors (1).

18192909292021 is an equidigital number, since it uses as much as digits as its factorization.

18192909292021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 839808, while the sum is 55.

The spelling of 18192909292021 in words is "eighteen trillion, one hundred ninety-two billion, nine hundred nine million, two hundred ninety-two thousand, twenty-one".