23019851 has 2 divisors, whose sum is σ = 23019852. Its totient is φ = 23019850.

The previous prime is 23019847. The next prime is 23019869. The reversal of 23019851 is 15891032.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23019851 - 2² = 23019847 is a prime.

It is not a weakly prime, because it can be changed into another prime (23015851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11509925 + 11509926.

It is an arithmetic number, because the mean of its divisors is an integer number (11509926).

Almost surely, 2^23019851 is an apocalyptic number.

23019851 is a deficient number, since it is larger than the sum of its proper divisors (1).

23019851 is an equidigital number, since it uses as much as digits as its factorization.

23019851 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 23019851 is about 4797.9006867587. The cubic root of 23019851 is about 284.4684912746.

The spelling of 23019851 in words is "twenty-three million, nineteen thousand, eight hundred fifty-one".