18240629 has 12 divisors (see below), whose sum is σ = 20224512. Its totient is φ = 16437960.

The previous prime is 18240619. The next prime is 18240631. The reversal of 18240629 is 92604281.

It is not a de Polignac number, because 18240629 - 2²⁰ = 17192053 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18240595 and 18240604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18240619) 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, 14774 + ... + 15960.

It is an arithmetic number, because the mean of its divisors is an integer number (1685376).

Almost surely, 2^18240629 is an apocalyptic number.

It is an amenable number.

18240629 is a deficient number, since it is larger than the sum of its proper divisors (1983883).

18240629 is a wasteful number, since it uses less digits than its factorization.

18240629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1336 (or 1325 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 18240629 is about 4270.9049392371. The cubic root of 18240629 is about 263.2368004163.

The spelling of 18240629 in words is "eighteen million, two hundred forty thousand, six hundred twenty-nine".