23540643 has 12 divisors (see below), whose sum is σ = 38860848. Its totient is φ = 13451760.

The previous prime is 23540641. The next prime is 23540653. The reversal of 23540643 is 34604532.

It is not a de Polignac number, because 23540643 - 2¹ = 23540641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23540641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 186768 + ... + 186893.

It is an arithmetic number, because the mean of its divisors is an integer number (3238404).

Almost surely, 2^23540643 is an apocalyptic number.

23540643 is a deficient number, since it is larger than the sum of its proper divisors (15320205).

23540643 is a wasteful number, since it uses less digits than its factorization.

23540643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373674 (or 373671 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

The square root of 23540643 is about 4851.8700518460. The cubic root of 23540643 is about 286.5977481400.

The spelling of 23540643 in words is "twenty-three million, five hundred forty thousand, six hundred forty-three".