18770969 has 6 divisors (see below), whose sum is σ = 21835674. Its totient is φ = 16089360.

The previous prime is 18770963. The next prime is 18770971. The reversal of 18770969 is 96907781.

It can be written as a sum of positive squares in only one way, i.e., 16711744 + 2059225 = 4088^2 + 1435^2 .

It is a de Polignac number, because none of the positive numbers 2^k-18770969 is a prime.

It is a super-2 number, since 2×18770969² = 704698554397922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18770963) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 191492 + ... + 191589.

It is an arithmetic number, because the mean of its divisors is an integer number (3639279).

Almost surely, 2^18770969 is an apocalyptic number.

It is an amenable number.

18770969 is a deficient number, since it is larger than the sum of its proper divisors (3064705).

18770969 is an equidigital number, since it uses as much as digits as its factorization.

18770969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383095 (or 383088 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 47.

The square root of 18770969 is about 4332.5476338986. The cubic root of 18770969 is about 265.7636404558.

The spelling of 18770969 in words is "eighteen million, seven hundred seventy thousand, nine hundred sixty-nine".