23149029493 has 4 divisors (see below), whose sum is σ = 23149764000. Its totient is φ = 23148294988.

The previous prime is 23149029479. The next prime is 23149029503. The reversal of 23149029493 is 39492094132.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23149029493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23149039493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 317755 + ... + 383752.

It is an arithmetic number, because the mean of its divisors is an integer number (5787441000).

Almost surely, 2^23149029493 is an apocalyptic number.

It is an amenable number.

23149029493 is a deficient number, since it is larger than the sum of its proper divisors (734507).

23149029493 is an equidigital number, since it uses as much as digits as its factorization.

23149029493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 734506.

The product of its (nonzero) digits is 419904, while the sum is 46.

The spelling of 23149029493 in words is "twenty-three billion, one hundred forty-nine million, twenty-nine thousand, four hundred ninety-three".