18040140454 has 8 divisors (see below), whose sum is σ = 30925955088. Its totient is φ = 7731488760.

The previous prime is 18040140451. The next prime is 18040140467. The reversal of 18040140454 is 45404104081.

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

It is a super-2 number, since 2×18040140454² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18040140451) 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, 644290717 + ... + 644290744.

It is an arithmetic number, because the mean of its divisors is an integer number (3865744386).

Almost surely, 2^18040140454 is an apocalyptic number.

18040140454 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18040140454 is a deficient number, since it is larger than the sum of its proper divisors (12885814634).

18040140454 is a wasteful number, since it uses less digits than its factorization.

18040140454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1288581470.

The product of its (nonzero) digits is 10240, while the sum is 31.

The spelling of 18040140454 in words is "eighteen billion, forty million, one hundred forty thousand, four hundred fifty-four".