21134423310 has 512 divisors, whose sum is σ = 73073000448. Its totient is φ = 3768145920.

The previous prime is 21134423291. The next prime is 21134423327. The reversal of 21134423310 is 1332443112.

It is a happy number.

It is a super-2 number, since 2×21134423310² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 25555117 + ... + 25555943.

It is an arithmetic number, because the mean of its divisors is an integer number (142720704).

Almost surely, 2^21134423310 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21134423310, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36536500224).

21134423310 is an abundant number, since it is smaller than the sum of its proper divisors (51938577138).

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

21134423310 is a wasteful number, since it uses less digits than its factorization.

21134423310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 928.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 21134423310 its reverse (1332443112), we get a palindrome (22466866422).

It can be divided in two parts, 21134 and 423310, that added together give a palindrome (444444).

The spelling of 21134423310 in words is "twenty-one billion, one hundred thirty-four million, four hundred twenty-three thousand, three hundred ten".