18372429 has 12 divisors (see below), whose sum is σ = 27394432. Its totient is φ = 11853000.

The previous prime is 18372401. The next prime is 18372433. The reversal of 18372429 is 92427381.

It is not a de Polignac number, because 18372429 - 2²⁴ = 1595213 is a prime.

It is a super-2 number, since 2×18372429² = 675092294720082, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18372393 and 18372402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18372329) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32647 + ... + 33204.

Almost surely, 2^18372429 is an apocalyptic number.

It is an amenable number.

18372429 is a deficient number, since it is larger than the sum of its proper divisors (9022003).

18372429 is a wasteful number, since it uses less digits than its factorization.

18372429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65888 (or 65885 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 18372429 is about 4286.3071518499. The cubic root of 18372429 is about 263.8692965267.

The spelling of 18372429 in words is "eighteen million, three hundred seventy-two thousand, four hundred twenty-nine".