18954049 has 2 divisors, whose sum is σ = 18954050. Its totient is φ = 18954048.

The previous prime is 18954041. The next prime is 18954071. The reversal of 18954049 is 94045981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16974400 + 1979649 = 4120^2 + 1407^2 .

It is a cyclic number.

It is not a de Polignac number, because 18954049 - 2³ = 18954041 is a prime.

It is a super-3 number, since 3×18954049³ (a number of 23 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (18954041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9477024 + 9477025.

It is an arithmetic number, because the mean of its divisors is an integer number (9477025).

Almost surely, 2^18954049 is an apocalyptic number.

It is an amenable number.

18954049 is a deficient number, since it is larger than the sum of its proper divisors (1).

18954049 is an equidigital number, since it uses as much as digits as its factorization.

18954049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 18954049 is about 4353.6248115794. The cubic root of 18954049 is about 266.6248759164.

The spelling of 18954049 in words is "eighteen million, nine hundred fifty-four thousand, forty-nine".