19904051 has 2 divisors, whose sum is σ = 19904052. Its totient is φ = 19904050.

The previous prime is 19903997. The next prime is 19904081. The reversal of 19904051 is 15040991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19904051 - 2²² = 15709747 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (19904081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9952025 + 9952026.

It is an arithmetic number, because the mean of its divisors is an integer number (9952026).

Almost surely, 2^19904051 is an apocalyptic number.

19904051 is a deficient number, since it is larger than the sum of its proper divisors (1).

19904051 is an equidigital number, since it uses as much as digits as its factorization.

19904051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1620, while the sum is 29.

The square root of 19904051 is about 4461.3956336555. The cubic root of 19904051 is about 271.0069895575.

The spelling of 19904051 in words is "nineteen million, nine hundred four thousand, fifty-one".