21423044204 has 6 divisors (see below), whose sum is σ = 37490327364. Its totient is φ = 10711522100.

The previous prime is 21423044183. The next prime is 21423044231. The reversal of 21423044204 is 40244032412.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2677880522 + ... + 2677880529.

It is an arithmetic number, because the mean of its divisors is an integer number (6248387894).

Almost surely, 2^21423044204 is an apocalyptic number.

It is an amenable number.

21423044204 is a deficient number, since it is larger than the sum of its proper divisors (16067283160).

21423044204 is a wasteful number, since it uses less digits than its factorization.

21423044204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5355761055 (or 5355761053 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 26.

Adding to 21423044204 its reverse (40244032412), we get a palindrome (61667076616).

The spelling of 21423044204 in words is "twenty-one billion, four hundred twenty-three million, forty-four thousand, two hundred four".