18951181148 has 12 divisors (see below), whose sum is σ = 33177296880. Its totient is φ = 9471953472.

The previous prime is 18951181141. The next prime is 18951181189. The reversal of 18951181148 is 84118115981.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18951181141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 897536 + ... + 918407.

It is an arithmetic number, because the mean of its divisors is an integer number (2764774740).

Almost surely, 2^18951181148 is an apocalyptic number.

It is an amenable number.

18951181148 is a deficient number, since it is larger than the sum of its proper divisors (14226115732).

18951181148 is a wasteful number, since it uses less digits than its factorization.

18951181148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1818556 (or 1818554 counting only the distinct ones).

The product of its digits is 92160, while the sum is 47.

The spelling of 18951181148 in words is "eighteen billion, nine hundred fifty-one million, one hundred eighty-one thousand, one hundred forty-eight".