21420130302420 has 24 divisors (see below), whose sum is σ = 59976364846944. Its totient is φ = 5712034747296.

The previous prime is 21420130302419. The next prime is 21420130302491. The reversal of 21420130302420 is 2420303102412.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178501085794 + ... + 178501085913.

It is an arithmetic number, because the mean of its divisors is an integer number (2499015201956).

Almost surely, 2^{21420130302420} is an apocalyptic number.

21420130302420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21420130302420 is an abundant number, since it is smaller than the sum of its proper divisors (38556234544524).

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

21420130302420 is a wasteful number, since it uses less digits than its factorization.

21420130302420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357002171719 (or 357002171717 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 21420130302420 its reverse (2420303102412), we get a palindrome (23840433404832).

The spelling of 21420130302420 in words is "twenty-one trillion, four hundred twenty billion, one hundred thirty million, three hundred two thousand, four hundred twenty".