21430409204 has 12 divisors (see below), whose sum is σ = 37504620384. Its totient is φ = 10714803384.

The previous prime is 21430409201. The next prime is 21430409227. The reversal of 21430409204 is 40290403412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21430409201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42449 + ... + 211335.

It is an arithmetic number, because the mean of its divisors is an integer number (3125385032).

Almost surely, 2^21430409204 is an apocalyptic number.

It is an amenable number.

21430409204 is a deficient number, since it is larger than the sum of its proper divisors (16074211180).

21430409204 is a wasteful number, since it uses less digits than its factorization.

21430409204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200614 (or 200612 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The spelling of 21430409204 in words is "twenty-one billion, four hundred thirty million, four hundred nine thousand, two hundred four".