23853478921 has 8 divisors (see below), whose sum is σ = 25184789600. Its totient is φ = 22529754720.

The previous prime is 23853478801. The next prime is 23853478939. The reversal of 23853478921 is 12987435832.

It is a happy number.

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-23853478921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23853478981) 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, 1890156 + ... + 1902733.

It is an arithmetic number, because the mean of its divisors is an integer number (3148098700).

Almost surely, 2^23853478921 is an apocalyptic number.

It is an amenable number.

23853478921 is a deficient number, since it is larger than the sum of its proper divisors (1331310679).

23853478921 is a wasteful number, since it uses less digits than its factorization.

23853478921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3793239.

The product of its digits is 2903040, while the sum is 52.

The spelling of 23853478921 in words is "twenty-three billion, eight hundred fifty-three million, four hundred seventy-eight thousand, nine hundred twenty-one".