21420130302430 has 16 divisors (see below), whose sum is σ = 38721711950064. Its totient is φ = 8531279364160.

The previous prime is 21420130302419. The next prime is 21420130302491. The reversal of 21420130302430 is 3420303102412.

It is a junction number, because it is equal to n+sod(n) for n = 21420130302395 and 21420130302404.

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, 4596592156 + ... + 4596596815.

It is an arithmetic number, because the mean of its divisors is an integer number (2420106996879).

Almost surely, 2^{21420130302430} is an apocalyptic number.

21420130302430 is a deficient number, since it is larger than the sum of its proper divisors (17301581647634).

21420130302430 is a wasteful number, since it uses less digits than its factorization.

21420130302430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9193189211.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 21420130302430 its reverse (3420303102412), we get a palindrome (24840433404842).

The spelling of 21420130302430 in words is "twenty-one trillion, four hundred twenty billion, one hundred thirty million, three hundred two thousand, four hundred thirty".