21430409226 has 32 divisors (see below), whose sum is σ = 42982064640. Its totient is φ = 7123286016.

The previous prime is 21430409201. The next prime is 21430409227. The reversal of 21430409226 is 62290403412.

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 15 ways as a sum of consecutive naturals, for example, 6829930 + ... + 6833066.

It is an arithmetic number, because the mean of its divisors is an integer number (1343189520).

Almost surely, 2^21430409226 is an apocalyptic number.

21430409226 is an abundant number, since it is smaller than the sum of its proper divisors (21551655414).

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

21430409226 is a wasteful number, since it uses less digits than its factorization.

21430409226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5998.

The product of its (nonzero) digits is 20736, while the sum is 33.

The spelling of 21430409226 in words is "twenty-one billion, four hundred thirty million, four hundred nine thousand, two hundred twenty-six".