18746969 has 2 divisors, whose sum is σ = 18746970. Its totient is φ = 18746968.

The previous prime is 18746953. The next prime is 18746983. The reversal of 18746969 is 96964781.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9535744 + 9211225 = 3088^2 + 3035^2 .

It is an emirp because it is prime and its reverse (96964781) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18746969 - 2⁴ = 18746953 is a prime.

It is a super-2 number, since 2×18746969² = 702897693373922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18746929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9373484 + 9373485.

It is an arithmetic number, because the mean of its divisors is an integer number (9373485).

Almost surely, 2^18746969 is an apocalyptic number.

It is an amenable number.

18746969 is a deficient number, since it is larger than the sum of its proper divisors (1).

18746969 is an equidigital number, since it uses as much as digits as its factorization.

18746969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 50.

The square root of 18746969 is about 4329.7770150436. Note that the first 3 decimals coincide. The cubic root of 18746969 is about 265.6503263326.

The spelling of 18746969 in words is "eighteen million, seven hundred forty-six thousand, nine hundred sixty-nine".