18340948779 has 32 divisors (see below), whose sum is σ = 25454499840. Its totient is φ = 11734329600.

The previous prime is 18340948777. The next prime is 18340948781. The reversal of 18340948779 is 97784904381.

It is an interprime number because it is at equal distance from previous prime (18340948777) and next prime (18340948781).

It is not a de Polignac number, because 18340948779 - 2¹ = 18340948777 is a prime.

It is a super-2 number, since 2×18340948779² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18340948771) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7007079 + ... + 7009695.

It is an arithmetic number, because the mean of its divisors is an integer number (795453120).

Almost surely, 2^18340948779 is an apocalyptic number.

18340948779 is a deficient number, since it is larger than the sum of its proper divisors (7113551061).

18340948779 is a wasteful number, since it uses less digits than its factorization.

18340948779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3251.

The product of its (nonzero) digits is 12192768, while the sum is 60.

The spelling of 18340948779 in words is "eighteen billion, three hundred forty million, nine hundred forty-eight thousand, seven hundred seventy-nine".