21420130302432 has 72 divisors (see below), whose sum is σ = 60933648039264. Its totient is φ = 7137681237504.

The previous prime is 21420130302419. The next prime is 21420130302491. The reversal of 21420130302432 is 23420303102412.

21420130302432 is a `hidden beast` number, since 21 + 4 + 201 + 3 + 0 + 3 + 0 + 2 + 432 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×21420130302432² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21420130302396 and 21420130302405.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11430973 + ... + 13172220.

It is an arithmetic number, because the mean of its divisors is an integer number (846300667212).

Almost surely, 2^{21420130302432} is an apocalyptic number.

It is an amenable number.

21420130302432 is an abundant number, since it is smaller than the sum of its proper divisors (39513517736832).

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

21420130302432 is a wasteful number, since it uses less digits than its factorization.

21420130302432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24606232 (or 24606221 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 21420130302432 its reverse (23420303102412), we get a palindrome (44840433404844).

The spelling of 21420130302432 in words is "twenty-one trillion, four hundred twenty billion, one hundred thirty million, three hundred two thousand, four hundred thirty-two".