18423925143 has 16 divisors (see below), whose sum is σ = 26474100576. Its totient is φ = 11329557120.

The previous prime is 18423925139. The next prime is 18423925153. The reversal of 18423925143 is 34152932481.

It is a happy number.

It is not a de Polignac number, because 18423925143 - 2² = 18423925139 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18423925095 and 18423925104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18423925133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117180 + ... + 224897.

It is an arithmetic number, because the mean of its divisors is an integer number (1654631286).

Almost surely, 2^18423925143 is an apocalyptic number.

18423925143 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

18423925143 is a deficient number, since it is larger than the sum of its proper divisors (8050175433).

18423925143 is a wasteful number, since it uses less digits than its factorization.

18423925143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343474.

The product of its digits is 207360, while the sum is 42.

The spelling of 18423925143 in words is "eighteen billion, four hundred twenty-three million, nine hundred twenty-five thousand, one hundred forty-three".