18621088 has 12 divisors (see below), whose sum is σ = 36660330. Its totient is φ = 9310528.

The previous prime is 18621079. The next prime is 18621089. The reversal of 18621088 is 88012681.

It can be written as a sum of positive squares in only one way, i.e., 16224784 + 2396304 = 4028^2 + 1548^2 .

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (18621089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 290923 + ... + 290986.

Almost surely, 2^18621088 is an apocalyptic number.

It is an amenable number.

18621088 is a deficient number, since it is larger than the sum of its proper divisors (18039242).

18621088 is an equidigital number, since it uses as much as digits as its factorization.

18621088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581919 (or 581911 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 34.

The square root of 18621088 is about 4315.2158694554. The cubic root of 18621088 is about 265.0543996543.

The spelling of 18621088 in words is "eighteen million, six hundred twenty-one thousand, eighty-eight".