18941137 has 2 divisors, whose sum is σ = 18941138. Its totient is φ = 18941136.

The previous prime is 18941129. The next prime is 18941149. The reversal of 18941137 is 73114981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16329681 + 2611456 = 4041^2 + 1616^2 .

It is a cyclic number.

It is not a de Polignac number, because 18941137 - 2³ = 18941129 is a prime.

It is not a weakly prime, because it can be changed into another prime (18941177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9470568 + 9470569.

It is an arithmetic number, because the mean of its divisors is an integer number (9470569).

Almost surely, 2^18941137 is an apocalyptic number.

It is an amenable number.

18941137 is a deficient number, since it is larger than the sum of its proper divisors (1).

18941137 is an equidigital number, since it uses as much as digits as its factorization.

18941137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 34.

The square root of 18941137 is about 4352.1416567019. The cubic root of 18941137 is about 266.5643181883.

The spelling of 18941137 in words is "eighteen million, nine hundred forty-one thousand, one hundred thirty-seven".