21134426244 has 24 divisors (see below), whose sum is σ = 50122083648. Its totient is φ = 6929319840.

The previous prime is 21134426219. The next prime is 21134426249. The reversal of 21134426244 is 44262443112.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (21134426249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14435352 + ... + 14436815.

It is an arithmetic number, because the mean of its divisors is an integer number (2088420152).

Almost surely, 2^21134426244 is an apocalyptic number.

It is an amenable number.

21134426244 is an abundant number, since it is smaller than the sum of its proper divisors (28987657404).

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

21134426244 is a wasteful number, since it uses less digits than its factorization.

21134426244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28872235 (or 28872233 counting only the distinct ones).

The product of its digits is 36864, while the sum is 33.

Adding to 21134426244 its reverse (44262443112), we get a palindrome (65396869356).

The spelling of 21134426244 in words is "twenty-one billion, one hundred thirty-four million, four hundred twenty-six thousand, two hundred forty-four".