23142432440 has 64 divisors (see below), whose sum is σ = 54844884000. Its totient is φ = 8764346880.

The previous prime is 23142432437. The next prime is 23142432473. The reversal of 23142432440 is 4423424132.

It is a super-3 number, since 3×23142432440³ (a number of 32 digits) contains 333 as substring.

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, 1351130 + ... + 1368150.

Almost surely, 2^23142432440 is an apocalyptic number.

23142432440 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 23142432440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27422442000).

23142432440 is an abundant number, since it is smaller than the sum of its proper divisors (31702451560).

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

23142432440 is a wasteful number, since it uses less digits than its factorization.

23142432440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18840 (or 18836 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 29.

Adding to 23142432440 its reverse (4423424132), we get a palindrome (27565856572).

The spelling of 23142432440 in words is "twenty-three billion, one hundred forty-two million, four hundred thirty-two thousand, four hundred forty".