21302102431424 has 56 divisors (see below), whose sum is σ = 43729985031600. Its totient is φ = 10283540198400.

The previous prime is 21302102431381. The next prime is 21302102431429. The reversal of 21302102431424 is 42413420120312.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is not an unprimeable number, because it can be changed into a prime (21302102431429) 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, 104166074 + ... + 104370374.

It is an arithmetic number, because the mean of its divisors is an integer number (780892589850).

Almost surely, 2^{21302102431424} is an apocalyptic number.

It is an amenable number.

21302102431424 is an abundant number, since it is smaller than the sum of its proper divisors (22427882600176).

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

21302102431424 is a wasteful number, since it uses less digits than its factorization.

21302102431424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260521 (or 260511 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 21302102431424 its reverse (42413420120312), we get a palindrome (63715522551736).

The spelling of 21302102431424 in words is "twenty-one trillion, three hundred two billion, one hundred two million, four hundred thirty-one thousand, four hundred twenty-four".