23513833947 has 16 divisors (see below), whose sum is σ = 31588094720. Its totient is φ = 15557808672.

The previous prime is 23513833939. The next prime is 23513833991. The reversal of 23513833947 is 74933831532.

It is not a de Polignac number, because 23513833947 - 2³ = 23513833939 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 23513833896 and 23513833905.

It is not an unprimeable number, because it can be changed into a prime (23513833927) 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, 1498818 + ... + 1514424.

It is an arithmetic number, because the mean of its divisors is an integer number (1974255920).

Almost surely, 2^23513833947 is an apocalyptic number.

23513833947 is a deficient number, since it is larger than the sum of its proper divisors (8074260773).

23513833947 is a wasteful number, since it uses less digits than its factorization.

23513833947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19362.

The product of its digits is 1632960, while the sum is 48.

The spelling of 23513833947 in words is "twenty-three billion, five hundred thirteen million, eight hundred thirty-three thousand, nine hundred forty-seven".