18940416426 has 12 divisors (see below), whose sum is σ = 41037568962. Its totient is φ = 6313472136.

The previous prime is 18940416421. The next prime is 18940416427. The reversal of 18940416426 is 62461404981.

18940416426 is a `hidden beast` number, since 1 + 89 + 404 + 164 + 2 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 18546354225 + 394062201 = 136185^2 + 19851^2 .

It is a super-2 number, since 2×18940416426² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18940416421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 526122661 + ... + 526122696.

Almost surely, 2^18940416426 is an apocalyptic number.

18940416426 is an abundant number, since it is smaller than the sum of its proper divisors (22097152536).

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

18940416426 is a wasteful number, since it uses less digits than its factorization.

18940416426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1052245365 (or 1052245362 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The spelling of 18940416426 in words is "eighteen billion, nine hundred forty million, four hundred sixteen thousand, four hundred twenty-six".