18672620 has 24 divisors (see below), whose sum is σ = 39390624. Its totient is φ = 7435136.

The previous prime is 18672617. The next prime is 18672631. The reversal of 18672620 is 2627681.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2657 + ... + 6663.

It is an arithmetic number, because the mean of its divisors is an integer number (1641276).

Almost surely, 2^18672620 is an apocalyptic number.

18672620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18672620 is an abundant number, since it is smaller than the sum of its proper divisors (20718004).

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

18672620 is a wasteful number, since it uses less digits than its factorization.

18672620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4249 (or 4247 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 18672620 is about 4321.1827084723. The cubic root of 18672620 is about 265.2986783074.

The spelling of 18672620 in words is "eighteen million, six hundred seventy-two thousand, six hundred twenty".