18622740 has 24 divisors (see below), whose sum is σ = 52143840. Its totient is φ = 4966048.

The previous prime is 18622711. The next prime is 18622757. The reversal of 18622740 is 4722681.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 18622698 and 18622707.

It is a congruent number.

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, 155130 + ... + 155249.

It is an arithmetic number, because the mean of its divisors is an integer number (2172660).

Almost surely, 2^18622740 is an apocalyptic number.

18622740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18622740 is an abundant number, since it is smaller than the sum of its proper divisors (33521100).

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

18622740 is a wasteful number, since it uses less digits than its factorization.

18622740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310391 (or 310389 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 18622740 is about 4315.4072808948. The cubic root of 18622740 is about 265.0622376661.

The spelling of 18622740 in words is "eighteen million, six hundred twenty-two thousand, seven hundred forty".