23523781138 has 16 divisors (see below), whose sum is σ = 41454495936. Its totient is φ = 9870117840.

The previous prime is 23523781129. The next prime is 23523781159. The reversal of 23523781138 is 83118732532.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 23523781094 and 23523781103.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41125206 + ... + 41125777.

It is an arithmetic number, because the mean of its divisors is an integer number (2590905996).

Almost surely, 2^23523781138 is an apocalyptic number.

23523781138 is a deficient number, since it is larger than the sum of its proper divisors (17930714798).

23523781138 is a wasteful number, since it uses less digits than its factorization.

23523781138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82251009.

The product of its digits is 241920, while the sum is 43.

The spelling of 23523781138 in words is "twenty-three billion, five hundred twenty-three million, seven hundred eighty-one thousand, one hundred thirty-eight".