23123229990 has 32 divisors (see below), whose sum is σ = 63423717120. Its totient is φ = 5285309664.

The previous prime is 23123229989. The next prime is 23123230049. The reversal of 23123229990 is 9992232132.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55055100 + ... + 55055519.

It is an arithmetic number, because the mean of its divisors is an integer number (1981991160).

Almost surely, 2^23123229990 is an apocalyptic number.

23123229990 is an abundant number, since it is smaller than the sum of its proper divisors (40300487130).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23123229990 is a wasteful number, since it uses less digits than its factorization.

23123229990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110110636.

The product of its (nonzero) digits is 104976, while the sum is 42.

The spelling of 23123229990 in words is "twenty-three billion, one hundred twenty-three million, two hundred twenty-nine thousand, nine hundred ninety".