23145919087 has 4 divisors (see below), whose sum is σ = 23149617480. Its totient is φ = 23142220696.

The previous prime is 23145919063. The next prime is 23145919099. The reversal of 23145919087 is 78091954132.

It is a happy number.

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 23145919087 - 2³¹ = 20998435439 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23145919087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23145919007) 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, 1839793 + ... + 1852330.

It is an arithmetic number, because the mean of its divisors is an integer number (5787404370).

Almost surely, 2^23145919087 is an apocalyptic number.

23145919087 is a deficient number, since it is larger than the sum of its proper divisors (3698393).

23145919087 is an equidigital number, since it uses as much as digits as its factorization.

23145919087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3698392.

The product of its (nonzero) digits is 544320, while the sum is 49.

The spelling of 23145919087 in words is "twenty-three billion, one hundred forty-five million, nine hundred nineteen thousand, eighty-seven".