18961049118 has 16 divisors (see below), whose sum is σ = 41369561856. Its totient is φ = 5745772440.

The previous prime is 18961049117. The next prime is 18961049137. The reversal of 18961049118 is 81194016981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18961049117) 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, 143644246 + ... + 143644377.

It is an arithmetic number, because the mean of its divisors is an integer number (2585597616).

Almost surely, 2^18961049118 is an apocalyptic number.

18961049118 is an abundant number, since it is smaller than the sum of its proper divisors (22408512738).

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

18961049118 is a wasteful number, since it uses less digits than its factorization.

18961049118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287288639.

The product of its (nonzero) digits is 124416, while the sum is 48.

The spelling of 18961049118 in words is "eighteen billion, nine hundred sixty-one million, forty-nine thousand, one hundred eighteen".