18679620 has 48 divisors (see below), whose sum is σ = 52496640. Its totient is φ = 4962816.

The previous prime is 18679613. The next prime is 18679621. The reversal of 18679620 is 2697681.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (18679621) 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, 25621 + ... + 26339.

It is an arithmetic number, because the mean of its divisors is an integer number (1093680).

Almost surely, 2^18679620 is an apocalyptic number.

18679620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18679620 is an abundant number, since it is smaller than the sum of its proper divisors (33817020).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18679620 is a wasteful number, since it uses less digits than its factorization.

18679620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1164 (or 1162 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 18679620 is about 4321.9925960140. The cubic root of 18679620 is about 265.3318259274.

The spelling of 18679620 in words is "eighteen million, six hundred seventy-nine thousand, six hundred twenty".