23296781 has 4 divisors (see below), whose sum is σ = 23537052. Its totient is φ = 23056512.

The previous prime is 23296727. The next prime is 23296787. The reversal of 23296781 is 18769232.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4884100 + 18412681 = 2210^2 + 4291^2 .

It is a de Polignac number, because none of the positive numbers 2^k-23296781 is a prime.

It is a super-2 number, since 2×23296781² = 1085480009923922, 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 (23296787) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119990 + ... + 120183.

It is an arithmetic number, because the mean of its divisors is an integer number (5884263).

Almost surely, 2^23296781 is an apocalyptic number.

It is an amenable number.

23296781 is a deficient number, since it is larger than the sum of its proper divisors (240271).

23296781 is an equidigital number, since it uses as much as digits as its factorization.

23296781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240270.

The product of its digits is 36288, while the sum is 38.

The square root of 23296781 is about 4826.6739065323. The cubic root of 23296781 is about 285.6046708443.

The spelling of 23296781 in words is "twenty-three million, two hundred ninety-six thousand, seven hundred eighty-one".