21354204230 has 32 divisors (see below), whose sum is σ = 39906699840. Its totient is φ = 8217336960.

The previous prime is 21354204229. The next prime is 21354204251. The reversal of 21354204230 is 3240245312.

It is a self number, because there is not a number n which added to its sum of digits gives 21354204230.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52586 + ... + 213245.

It is an arithmetic number, because the mean of its divisors is an integer number (1247084370).

Almost surely, 2^21354204230 is an apocalyptic number.

21354204230 is a deficient number, since it is larger than the sum of its proper divisors (18552495610).

21354204230 is a wasteful number, since it uses less digits than its factorization.

21354204230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266144.

The product of its (nonzero) digits is 5760, while the sum is 26.

Adding to 21354204230 its reverse (3240245312), we get a palindrome (24594449542).

The spelling of 21354204230 in words is "twenty-one billion, three hundred fifty-four million, two hundred four thousand, two hundred thirty".