21420130302431 has 8 divisors (see below), whose sum is σ = 24524902392960. Its totient is φ = 18326546580888.

The previous prime is 21420130302419. The next prime is 21420130302491. The reversal of 21420130302431 is 13420303102412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-21420130302431 is a prime.

It is a super-2 number, since 2×21420130302431² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21420130302431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21420130302491) 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, 2797088141 + ... + 2797095798.

It is an arithmetic number, because the mean of its divisors is an integer number (3065612799120).

Almost surely, 2^{21420130302431} is an apocalyptic number.

21420130302431 is a deficient number, since it is larger than the sum of its proper divisors (3104772090529).

21420130302431 is an equidigital number, since it uses as much as digits as its factorization.

21420130302431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5594184493.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 21420130302431 its reverse (13420303102412), we get a palindrome (34840433404843).

The spelling of 21420130302431 in words is "twenty-one trillion, four hundred twenty billion, one hundred thirty million, three hundred two thousand, four hundred thirty-one".