21430222104 has 128 divisors (see below), whose sum is σ = 58312094400. Its totient is φ = 6546677760.

The previous prime is 21430221997. The next prime is 21430222111. The reversal of 21430222104 is 40122203412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1045684 + ... + 1065980.

Almost surely, 2^21430222104 is an apocalyptic number.

21430222104 is a gapful number since it is divisible by the number (24) 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 21430222104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29156047200).

21430222104 is an abundant number, since it is smaller than the sum of its proper divisors (36881872296).

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

21430222104 is a wasteful number, since it uses less digits than its factorization.

21430222104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20413 (or 20409 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 21430222104 its reverse (40122203412), we get a palindrome (61552425516).

The spelling of 21430222104 in words is "twenty-one billion, four hundred thirty million, two hundred twenty-two thousand, one hundred four".