21230002351432 has 32 divisors (see below), whose sum is σ = 46722399001920. Its totient is φ = 8852665072320.

The previous prime is 21230002351423. The next prime is 21230002351433. The reversal of 21230002351432 is 23415320003212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 21230002351432.

It is not an unprimeable number, because it can be changed into a prime (21230002351433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5123067994 + ... + 5123072137.

It is an arithmetic number, because the mean of its divisors is an integer number (1460074968810).

Almost surely, 2^{21230002351432} is an apocalyptic number.

It is an amenable number.

21230002351432 is an abundant number, since it is smaller than the sum of its proper divisors (25492396650488).

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

21230002351432 is a wasteful number, since it uses less digits than its factorization.

21230002351432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10246140181 (or 10246140177 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

Adding to 21230002351432 its reverse (23415320003212), we get a palindrome (44645322354644).

The spelling of 21230002351432 in words is "twenty-one trillion, two hundred thirty billion, two million, three hundred fifty-one thousand, four hundred thirty-two".