23145032140 has 48 divisors (see below), whose sum is σ = 50263282944. Its totient is φ = 8943148800.

The previous prime is 23145032137. The next prime is 23145032231. The reversal of 23145032140 is 4123054132.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 311830 + ... + 378850.

It is an arithmetic number, because the mean of its divisors is an integer number (1047151728).

Almost surely, 2^23145032140 is an apocalyptic number.

23145032140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23145032140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25131641472).

23145032140 is an abundant number, since it is smaller than the sum of its proper divisors (27118250804).

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

23145032140 is a wasteful number, since it uses less digits than its factorization.

23145032140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67618 (or 67616 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 23145032140 its reverse (4123054132), we get a palindrome (27268086272).

The spelling of 23145032140 in words is "twenty-three billion, one hundred forty-five million, thirty-two thousand, one hundred forty".