19942051 has 2 divisors, whose sum is σ = 19942052. Its totient is φ = 19942050.

The previous prime is 19942033. The next prime is 19942063. The reversal of 19942051 is 15024991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19942051 - 2⁵ = 19942019 is a prime.

It is not a weakly prime, because it can be changed into another prime (19942451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9971025 + 9971026.

It is an arithmetic number, because the mean of its divisors is an integer number (9971026).

Almost surely, 2^19942051 is an apocalyptic number.

19942051 is a deficient number, since it is larger than the sum of its proper divisors (1).

19942051 is an equidigital number, since it uses as much as digits as its factorization.

19942051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 19942051 is about 4465.6523599582. The cubic root of 19942051 is about 271.1793450723.

The spelling of 19942051 in words is "nineteen million, nine hundred forty-two thousand, fifty-one".