18629139 has 16 divisors (see below), whose sum is σ = 26254080. Its totient is φ = 11717280.

The previous prime is 18629137. The next prime is 18629153. The reversal of 18629139 is 93192681.

It is not a de Polignac number, because 18629139 - 2¹ = 18629137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18629097 and 18629106.

It is not an unprimeable number, because it can be changed into a prime (18629137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17554 + ... + 18584.

It is an arithmetic number, because the mean of its divisors is an integer number (1640880).

Almost surely, 2^18629139 is an apocalyptic number.

18629139 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

18629139 is a deficient number, since it is larger than the sum of its proper divisors (7624941).

18629139 is a wasteful number, since it uses less digits than its factorization.

18629139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1370.

The product of its digits is 23328, while the sum is 39.

The square root of 18629139 is about 4316.1486304343. The cubic root of 18629139 is about 265.0925937259.

The spelling of 18629139 in words is "eighteen million, six hundred twenty-nine thousand, one hundred thirty-nine".