18421025610 has 64 divisors (see below), whose sum is σ = 47628282240. Its totient is φ = 4532785920.

The previous prime is 18421025593. The next prime is 18421025639. The reversal of 18421025610 is 1652012481.

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

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1374321 + ... + 1387659.

It is an arithmetic number, because the mean of its divisors is an integer number (744191910).

Almost surely, 2^18421025610 is an apocalyptic number.

18421025610 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18421025610 is an abundant number, since it is smaller than the sum of its proper divisors (29207256630).

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

18421025610 is a wasteful number, since it uses less digits than its factorization.

18421025610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16903.

The product of its (nonzero) digits is 3840, while the sum is 30.

The spelling of 18421025610 in words is "eighteen billion, four hundred twenty-one million, twenty-five thousand, six hundred ten".