18642782910 has 16 divisors (see below), whose sum is σ = 44742679056. Its totient is φ = 4971408768.

The previous prime is 18642782903. The next prime is 18642782911. The reversal of 18642782910 is 1928724681.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 18642782910.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18642782911) 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, 310713019 + ... + 310713078.

It is an arithmetic number, because the mean of its divisors is an integer number (2796417441).

Almost surely, 2^18642782910 is an apocalyptic number.

18642782910 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18642782910 is an abundant number, since it is smaller than the sum of its proper divisors (26099896146).

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

18642782910 is a wasteful number, since it uses less digits than its factorization.

18642782910 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621426107.

The product of its (nonzero) digits is 387072, while the sum is 48.

The spelling of 18642782910 in words is "eighteen billion, six hundred forty-two million, seven hundred eighty-two thousand, nine hundred ten".