23816981 has 8 divisors (see below), whose sum is σ = 24339744. Its totient is φ = 23297040.

The previous prime is 23816977. The next prime is 23816987. The reversal of 23816981 is 18961832.

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

It is a cyclic number.

It is not a de Polignac number, because 23816981 - 2² = 23816977 is a prime.

It is a super-2 number, since 2×23816981² = 1134497167908722, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23816987) 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, 29870 + ... + 30656.

It is an arithmetic number, because the mean of its divisors is an integer number (3042468).

Almost surely, 2^23816981 is an apocalyptic number.

It is an amenable number.

23816981 is a deficient number, since it is larger than the sum of its proper divisors (522763).

23816981 is an equidigital number, since it uses as much as digits as its factorization.

23816981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1411.

The product of its digits is 20736, while the sum is 38.

The square root of 23816981 is about 4880.2644395565. The cubic root of 23816981 is about 287.7148226813.

The spelling of 23816981 in words is "twenty-three million, eight hundred sixteen thousand, nine hundred eighty-one".