21430409228 has 24 divisors (see below), whose sum is σ = 38425400160. Its totient is φ = 10451825280.

The previous prime is 21430409227. The next prime is 21430409233. The reversal of 21430409228 is 82290403412.

It is not an unprimeable number, because it can be changed into a prime (21430409227) 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, 1164950 + ... + 1183202.

It is an arithmetic number, because the mean of its divisors is an integer number (1601058340).

Almost surely, 2^21430409228 is an apocalyptic number.

It is an amenable number.

21430409228 is a deficient number, since it is larger than the sum of its proper divisors (16994990932).

21430409228 is a wasteful number, since it uses less digits than its factorization.

21430409228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25457 (or 25455 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 35.

The spelling of 21430409228 in words is "twenty-one billion, four hundred thirty million, four hundred nine thousand, two hundred twenty-eight".