18634485 has 16 divisors (see below), whose sum is σ = 31112064. Its totient is φ = 9506112.

The previous prime is 18634481. The next prime is 18634489. The reversal of 18634485 is 58443681.

It is an interprime number because it is at equal distance from previous prime (18634481) and next prime (18634489).

It is not a de Polignac number, because 18634485 - 2² = 18634481 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18634481) 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, 26662 + ... + 27351.

It is an arithmetic number, because the mean of its divisors is an integer number (1944504).

Almost surely, 2^18634485 is an apocalyptic number.

18634485 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18634485 is a deficient number, since it is larger than the sum of its proper divisors (12477579).

18634485 is a wasteful number, since it uses less digits than its factorization.

18634485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54044.

The product of its digits is 92160, while the sum is 39.

The square root of 18634485 is about 4316.7678881311. The cubic root of 18634485 is about 265.1179491554.

The spelling of 18634485 in words is "eighteen million, six hundred thirty-four thousand, four hundred eighty-five".