23431220043132 has 96 divisors (see below), whose sum is σ = 60020000651520. Its totient is φ = 7055545236480.

The previous prime is 23431220043083. The next prime is 23431220043227. The reversal of 23431220043132 is 23134002213432.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 23431220043132.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42497919 + ... + 43045737.

It is an arithmetic number, because the mean of its divisors is an integer number (625208340120).

Almost surely, 2^{23431220043132} is an apocalyptic number.

23431220043132 is a gapful number since it is divisible by the number (22) 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 23431220043132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30010000325760).

23431220043132 is an abundant number, since it is smaller than the sum of its proper divisors (36588780608388).

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

23431220043132 is a wasteful number, since it uses less digits than its factorization.

23431220043132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549883 (or 549881 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 30.

Adding to 23431220043132 its reverse (23134002213432), we get a palindrome (46565222256564).

The spelling of 23431220043132 in words is "twenty-three trillion, four hundred thirty-one billion, two hundred twenty million, forty-three thousand, one hundred thirty-two".