21430422102420 has 144 divisors (see below), whose sum is σ = 65959557431040. Its totient is φ = 5631009753600.

The previous prime is 21430422102407. The next prime is 21430422102461. The reversal of 21430422102420 is 2420122403412.

It is a happy number.

21430422102420 is a `hidden beast` number, since 2 + 1 + 430 + 4 + 221 + 0 + 2 + 4 + 2 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21507201 + ... + 22481559.

It is an arithmetic number, because the mean of its divisors is an integer number (458052482160).

Almost surely, 2^{21430422102420} is an apocalyptic number.

21430422102420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21430422102420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32979778715520).

21430422102420 is an abundant number, since it is smaller than the sum of its proper divisors (44529135328620).

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

21430422102420 is a wasteful number, since it uses less digits than its factorization.

21430422102420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 976166 (or 976161 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 21430422102420 its reverse (2420122403412), we get a palindrome (23850544505832).

The spelling of 21430422102420 in words is "twenty-one trillion, four hundred thirty billion, four hundred twenty-two million, one hundred two thousand, four hundred twenty".