18621608770 has 16 divisors (see below), whose sum is σ = 33677756928. Its totient is φ = 7413341040.

The previous prime is 18621608743. The next prime is 18621608771. The reversal of 18621608770 is 7780612681.

It is a self number, because there is not a number n which added to its sum of digits gives 18621608770.

It is not an unprimeable number, because it can be changed into a prime (18621608771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4410594 + ... + 4414813.

It is an arithmetic number, because the mean of its divisors is an integer number (2104859808).

Almost surely, 2^18621608770 is an apocalyptic number.

18621608770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18621608770 is a deficient number, since it is larger than the sum of its proper divisors (15056148158).

18621608770 is a wasteful number, since it uses less digits than its factorization.

18621608770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8825625.

The product of its (nonzero) digits is 225792, while the sum is 46.

The spelling of 18621608770 in words is "eighteen billion, six hundred twenty-one million, six hundred eight thousand, seven hundred seventy".