18154293949 has 8 divisors (see below), whose sum is σ = 19923277248. Its totient is φ = 16405076160.

The previous prime is 18154293919. The next prime is 18154293961. The reversal of 18154293949 is 94939245181.

It is a happy number.

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

It is not a de Polignac number, because 18154293949 - 2¹³ = 18154285757 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18154293949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18154293919) 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, 4939452 + ... + 4943125.

It is an arithmetic number, because the mean of its divisors is an integer number (2490409656).

Almost surely, 2^18154293949 is an apocalyptic number.

It is an amenable number.

18154293949 is a deficient number, since it is larger than the sum of its proper divisors (1768983299).

18154293949 is a wasteful number, since it uses less digits than its factorization.

18154293949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9882755.

The product of its digits is 2799360, while the sum is 55.

The spelling of 18154293949 in words is "eighteen billion, one hundred fifty-four million, two hundred ninety-three thousand, nine hundred forty-nine".