18113929 has 2 divisors, whose sum is σ = 18113930. Its totient is φ = 18113928.

The previous prime is 18113881. The next prime is 18113939. The reversal of 18113929 is 92931181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17015625 + 1098304 = 4125^2 + 1048^2 .

It is a cyclic number.

It is not a de Polignac number, because 18113929 - 2¹¹ = 18111881 is a prime.

It is a super-2 number, since 2×18113929² = 656228847634082, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18113894 and 18113903.

It is not a weakly prime, because it can be changed into another prime (18113939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9056964 + 9056965.

It is an arithmetic number, because the mean of its divisors is an integer number (9056965).

Almost surely, 2^18113929 is an apocalyptic number.

It is an amenable number.

18113929 is a deficient number, since it is larger than the sum of its proper divisors (1).

18113929 is an equidigital number, since it uses as much as digits as its factorization.

18113929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 34.

The square root of 18113929 is about 4256.0461698624. The cubic root of 18113929 is about 262.6258999994.

The spelling of 18113929 in words is "eighteen million, one hundred thirteen thousand, nine hundred twenty-nine".