18277754881 has 16 divisors (see below), whose sum is σ = 19698131200. Its totient is φ = 16903667088.

The previous prime is 18277754863. The next prime is 18277754909. The reversal of 18277754881 is 18845777281.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18277754881 is a prime.

It is a super-2 number, since 2×18277754881² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18277754681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1775110 + ... + 1785376.

It is an arithmetic number, because the mean of its divisors is an integer number (1231133200).

Almost surely, 2^18277754881 is an apocalyptic number.

It is an amenable number.

18277754881 is a deficient number, since it is larger than the sum of its proper divisors (1420376319).

18277754881 is a wasteful number, since it uses less digits than its factorization.

18277754881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12508.

The product of its digits is 7024640, while the sum is 58.

The spelling of 18277754881 in words is "eighteen billion, two hundred seventy-seven million, seven hundred fifty-four thousand, eight hundred eighty-one".