21302142100432 has 20 divisors (see below), whose sum is σ = 41276269640736. Its totient is φ = 10650201548000.

The previous prime is 21302142100427. The next prime is 21302142100439. The reversal of 21302142100432 is 23400124120312.

It is a junction number, because it is equal to n+sod(n) for n = 21302142100397 and 21302142100406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21302142100439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54141748 + ... + 54533779.

Almost surely, 2^{21302142100432} is an apocalyptic number.

It is an amenable number.

21302142100432 is a deficient number, since it is larger than the sum of its proper divisors (19974127540304).

21302142100432 is a wasteful number, since it uses less digits than its factorization.

21302142100432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108687786 (or 108687780 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 21302142100432 its reverse (23400124120312), we get a palindrome (44702266220744).

The spelling of 21302142100432 in words is "twenty-one trillion, three hundred two billion, one hundred forty-two million, one hundred thousand, four hundred thirty-two".