23847540891 has 16 divisors (see below), whose sum is σ = 33671420064. Its totient is φ = 14961250304.

The previous prime is 23847540881. The next prime is 23847540929. The reversal of 23847540891 is 19804574832.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 23847540891 - 2⁵ = 23847540859 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (23847540811) 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, 446851 + ... + 497363.

It is an arithmetic number, because the mean of its divisors is an integer number (2104463754).

Almost surely, 2^23847540891 is an apocalyptic number.

23847540891 is a deficient number, since it is larger than the sum of its proper divisors (9823879173).

23847540891 is a wasteful number, since it uses less digits than its factorization.

23847540891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59790.

The product of its (nonzero) digits is 1935360, while the sum is 51.

The spelling of 23847540891 in words is "twenty-three billion, eight hundred forty-seven million, five hundred forty thousand, eight hundred ninety-one".