18622730 has 32 divisors (see below), whose sum is σ = 38513664. Its totient is φ = 6350976.

The previous prime is 18622711. The next prime is 18622757. The reversal of 18622730 is 3722681.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 18622693 and 18622702.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15014 + ... + 16206.

It is an arithmetic number, because the mean of its divisors is an integer number (1203552).

Almost surely, 2^18622730 is an apocalyptic number.

18622730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18622730 is an abundant number, since it is smaller than the sum of its proper divisors (19890934).

18622730 is a wasteful number, since it uses less digits than its factorization.

18622730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1430.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 18622730 is about 4315.4061222555. The cubic root of 18622730 is about 265.0621902219.

The spelling of 18622730 in words is "eighteen million, six hundred twenty-two thousand, seven hundred thirty".