18773861106 has 256 divisors, whose sum is σ = 51460964352. Its totient is φ = 4408992000.

The previous prime is 18773861101. The next prime is 18773861123. The reversal of 18773861106 is 60116837781.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (18773861101) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 115176981 + ... + 115177143.

It is an arithmetic number, because the mean of its divisors is an integer number (201019392).

Almost surely, 2^18773861106 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18773861106, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25730482176).

18773861106 is an abundant number, since it is smaller than the sum of its proper divisors (32687103246).

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

18773861106 is a wasteful number, since it uses less digits than its factorization.

18773861106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477.

The product of its (nonzero) digits is 338688, while the sum is 48.

The spelling of 18773861106 in words is "eighteen billion, seven hundred seventy-three million, eight hundred sixty-one thousand, one hundred six".