23291142920 has 16 divisors (see below), whose sum is σ = 52405071660. Its totient is φ = 9316457152.

The previous prime is 23291142907. The next prime is 23291143009. The reversal of 23291142920 is 2924119232.

It can be written as a sum of positive squares in 2 ways, for example, as 22775035396 + 516107524 = 150914^2 + 22718^2 .

It is a super-2 number, since 2×23291142920² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 291139247 + ... + 291139326.

Almost surely, 2^23291142920 is an apocalyptic number.

23291142920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23291142920 is an abundant number, since it is smaller than the sum of its proper divisors (29113928740).

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

23291142920 is a wasteful number, since it uses less digits than its factorization.

23291142920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 582278584 (or 582278580 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 35.

The spelling of 23291142920 in words is "twenty-three billion, two hundred ninety-one million, one hundred forty-two thousand, nine hundred twenty".