23478131889 has 24 divisors (see below), whose sum is σ = 35408198592. Its totient is φ = 14962733280.

The previous prime is 23478131861. The next prime is 23478131917. The reversal of 23478131889 is 98813187432.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (23478131861) and next prime (23478131917).

It is not a de Polignac number, because 23478131889 - 2⁹ = 23478131377 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (23478131819) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 327814 + ... + 392960.

It is an arithmetic number, because the mean of its divisors is an integer number (1475341608).

Almost surely, 2^23478131889 is an apocalyptic number.

It is an amenable number.

23478131889 is a deficient number, since it is larger than the sum of its proper divisors (11930066703).

23478131889 is a wasteful number, since it uses less digits than its factorization.

23478131889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66917 (or 66914 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 54.

The spelling of 23478131889 in words is "twenty-three billion, four hundred seventy-eight million, one hundred thirty-one thousand, eight hundred eighty-nine".