18950497 has 2 divisors, whose sum is σ = 18950498. Its totient is φ = 18950496.

The previous prime is 18950489. The next prime is 18950507. The reversal of 18950497 is 79405981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18011536 + 938961 = 4244^2 + 969^2 .

It is a cyclic number.

It is not a de Polignac number, because 18950497 - 2³ = 18950489 is a prime.

It is not a weakly prime, because it can be changed into another prime (18950297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9475248 + 9475249.

It is an arithmetic number, because the mean of its divisors is an integer number (9475249).

Almost surely, 2^18950497 is an apocalyptic number.

It is an amenable number.

18950497 is a deficient number, since it is larger than the sum of its proper divisors (1).

18950497 is an equidigital number, since it uses as much as digits as its factorization.

18950497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 18950497 is about 4353.2168565326. The cubic root of 18950497 is about 266.6082196560.

The spelling of 18950497 in words is "eighteen million, nine hundred fifty thousand, four hundred ninety-seven".