21244242234 has 16 divisors (see below), whose sum is σ = 42492051072. Its totient is φ = 7080819648.

The previous prime is 21244242223. The next prime is 21244242259. The reversal of 21244242234 is 43224244212.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67794 + ... + 216989.

It is an arithmetic number, because the mean of its divisors is an integer number (2655753192).

Almost surely, 2^21244242234 is an apocalyptic number.

21244242234 is an abundant number, since it is smaller than the sum of its proper divisors (21247808838).

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

21244242234 is a wasteful number, since it uses less digits than its factorization.

21244242234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297221.

The product of its digits is 24576, while the sum is 30.

Adding to 21244242234 its reverse (43224244212), we get a palindrome (64468486446).

The spelling of 21244242234 in words is "twenty-one billion, two hundred forty-four million, two hundred forty-two thousand, two hundred thirty-four".