23978634547 has 8 divisors (see below), whose sum is σ = 27417288800. Its totient is φ = 20543264064.

The previous prime is 23978634541. The next prime is 23978634553. The reversal of 23978634547 is 74543687932.

It is an interprime number because it is at equal distance from previous prime (23978634541) and next prime (23978634553).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23978634547 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23978634491 and 23978634500.

It is not an unprimeable number, because it can be changed into a prime (23978634541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 805272 + ... + 834517.

It is an arithmetic number, because the mean of its divisors is an integer number (3427161100).

Almost surely, 2^23978634547 is an apocalyptic number.

23978634547 is a deficient number, since it is larger than the sum of its proper divisors (3438654253).

23978634547 is a wasteful number, since it uses less digits than its factorization.

23978634547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1641885.

The product of its digits is 30481920, while the sum is 58.

The spelling of 23978634547 in words is "twenty-three billion, nine hundred seventy-eight million, six hundred thirty-four thousand, five hundred forty-seven".