23421431552 has 18 divisors (see below), whose sum is σ = 46751373648. Its totient is φ = 11710715648.

The previous prime is 23421431503. The next prime is 23421431569. The reversal of 23421431552 is 25513412432.

It is a super-2 number, since 2×23421431552² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45744728 + ... + 45745239.

It is an arithmetic number, because the mean of its divisors is an integer number (2597298536).

Almost surely, 2^23421431552 is an apocalyptic number.

It is an amenable number.

23421431552 is a deficient number, since it is larger than the sum of its proper divisors (23329942096).

23421431552 is an frugal number, since it uses more digits than its factorization.

23421431552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91489983 (or 91489969 counting only the distinct ones).

The product of its digits is 28800, while the sum is 32.

Adding to 23421431552 its reverse (25513412432), we get a palindrome (48934843984).

The spelling of 23421431552 in words is "twenty-three billion, four hundred twenty-one million, four hundred thirty-one thousand, five hundred fifty-two".