18233920779 has 8 divisors (see below), whose sum is σ = 25591467840. Its totient is φ = 11516160456.

The previous prime is 18233920729. The next prime is 18233920807. The reversal of 18233920779 is 97702933281.

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

It is not a de Polignac number, because 18233920779 - 2⁹ = 18233920267 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18233920709) 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, 159946617 + ... + 159946730.

It is an arithmetic number, because the mean of its divisors is an integer number (3198933480).

Almost surely, 2^18233920779 is an apocalyptic number.

18233920779 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

18233920779 is a deficient number, since it is larger than the sum of its proper divisors (7357547061).

18233920779 is a wasteful number, since it uses less digits than its factorization.

18233920779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319893369.

The product of its (nonzero) digits is 1143072, while the sum is 51.

The spelling of 18233920779 in words is "eighteen billion, two hundred thirty-three million, nine hundred twenty thousand, seven hundred seventy-nine".