23121331632 has 80 divisors (see below), whose sum is σ = 75847764480. Its totient is φ = 6606093888.

The previous prime is 23121331631. The next prime is 23121331633. The reversal of 23121331632 is 23613312132.

23121331632 is a `hidden beast` number, since 2 + 3 + 1 + 21 + 3 + 3 + 1 + 632 = 666.

It is an interprime number because it is at equal distance from previous prime (23121331631) and next prime (23121331633).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 23121331596 and 23121331605.

It is not an unprimeable number, because it can be changed into a prime (23121331631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3819948 + ... + 3825995.

It is an arithmetic number, because the mean of its divisors is an integer number (948097056).

Almost surely, 2^23121331632 is an apocalyptic number.

It is an amenable number.

23121331632 is an abundant number, since it is smaller than the sum of its proper divisors (52726432848).

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

23121331632 is a wasteful number, since it uses less digits than its factorization.

23121331632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7645967 (or 7645955 counting only the distinct ones).

The product of its digits is 3888, while the sum is 27.

Adding to 23121331632 its reverse (23613312132), we get a palindrome (46734643764).

The spelling of 23121331632 in words is "twenty-three billion, one hundred twenty-one million, three hundred thirty-one thousand, six hundred thirty-two".