23019643 has 4 divisors (see below), whose sum is σ = 23047920. Its totient is φ = 22991368.

The previous prime is 23019641. The next prime is 23019671. The reversal of 23019643 is 34691032.

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

It is a cyclic number.

It is not a de Polignac number, because 23019643 - 2¹ = 23019641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23019641) 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, 12880 + ... + 14557.

It is an arithmetic number, because the mean of its divisors is an integer number (5761980).

Almost surely, 2^23019643 is an apocalyptic number.

23019643 is a deficient number, since it is larger than the sum of its proper divisors (28277).

23019643 is an equidigital number, since it uses as much as digits as its factorization.

23019643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28276.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 23019643 is about 4797.8790105629. The cubic root of 23019643 is about 284.4676344833.

The spelling of 23019643 in words is "twenty-three million, nineteen thousand, six hundred forty-three".