21434232162 has 64 divisors (see below), whose sum is σ = 52023686400. Its totient is φ = 5747245056.

The previous prime is 21434232161. The next prime is 21434232167. The reversal of 21434232162 is 26123243412.

It is not an unprimeable number, because it can be changed into a prime (21434232161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 206178 + ... + 292194.

It is an arithmetic number, because the mean of its divisors is an integer number (812870100).

Almost surely, 2^21434232162 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21434232162, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26011843200).

21434232162 is an abundant number, since it is smaller than the sum of its proper divisors (30589454238).

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

21434232162 is a wasteful number, since it uses less digits than its factorization.

21434232162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86395.

The product of its digits is 13824, while the sum is 30.

Adding to 21434232162 its reverse (26123243412), we get a palindrome (47557475574).

The spelling of 21434232162 in words is "twenty-one billion, four hundred thirty-four million, two hundred thirty-two thousand, one hundred sixty-two".