23898134887 has 24 divisors (see below), whose sum is σ = 28542778880. Its totient is φ = 19918126800.

The previous prime is 23898134873. The next prime is 23898134891. The reversal of 23898134887 is 78843189832.

It is not a de Polignac number, because 23898134887 - 2¹⁵ = 23898102119 is a prime.

It is a super-2 number, since 2×23898134887² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23898134837) 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, 96393 + ... + 238930.

Almost surely, 2^23898134887 is an apocalyptic number.

23898134887 is a deficient number, since it is larger than the sum of its proper divisors (4644643993).

23898134887 is a wasteful number, since it uses less digits than its factorization.

23898134887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335395 (or 335384 counting only the distinct ones).

The product of its digits is 18579456, while the sum is 61.

Subtracting 23898134887 from its reverse (78843189832), we obtain a palindrome (54945054945).

The spelling of 23898134887 in words is "twenty-three billion, eight hundred ninety-eight million, one hundred thirty-four thousand, eight hundred eighty-seven".