18703969 has 2 divisors, whose sum is σ = 18703970. Its totient is φ = 18703968.

The previous prime is 18703933. The next prime is 18704041. The reversal of 18703969 is 96930781.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12006225 + 6697744 = 3465^2 + 2588^2 .

It is a cyclic number.

It is not a de Polignac number, because 18703969 - 2¹⁵ = 18671201 is a prime.

It is a super-2 number, since 2×18703969² = 699676912705922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18703169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9351984 + 9351985.

It is an arithmetic number, because the mean of its divisors is an integer number (9351985).

Almost surely, 2^18703969 is an apocalyptic number.

It is an amenable number.

18703969 is a deficient number, since it is larger than the sum of its proper divisors (1).

18703969 is an equidigital number, since it uses as much as digits as its factorization.

18703969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 18703969 is about 4324.8085506760. The cubic root of 18703969 is about 265.4470630955.

The spelling of 18703969 in words is "eighteen million, seven hundred three thousand, nine hundred sixty-nine".