18377969811 has 8 divisors (see below), whose sum is σ = 25793641920. Its totient is φ = 11607138792.

The previous prime is 18377969801. The next prime is 18377969837. The reversal of 18377969811 is 11896977381.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18377969811 - 2¹¹ = 18377967763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18377969801) 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, 161210205 + ... + 161210318.

It is an arithmetic number, because the mean of its divisors is an integer number (3224205240).

Almost surely, 2^18377969811 is an apocalyptic number.

18377969811 is a deficient number, since it is larger than the sum of its proper divisors (7415672109).

18377969811 is a wasteful number, since it uses less digits than its factorization.

18377969811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322420545.

The product of its digits is 4572288, while the sum is 60.

The spelling of 18377969811 in words is "eighteen billion, three hundred seventy-seven million, nine hundred sixty-nine thousand, eight hundred eleven".