21152344262 has 16 divisors (see below), whose sum is σ = 36855608352. Its totient is φ = 8916678720.

The previous prime is 21152344237. The next prime is 21152344267. The reversal of 21152344262 is 26244325112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21152344267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12383423 + ... + 12385130.

It is an arithmetic number, because the mean of its divisors is an integer number (2303475522).

Almost surely, 2^21152344262 is an apocalyptic number.

21152344262 is a deficient number, since it is larger than the sum of its proper divisors (15703264090).

21152344262 is a wasteful number, since it uses less digits than its factorization.

21152344262 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24768623.

The product of its digits is 23040, while the sum is 32.

Adding to 21152344262 its reverse (26244325112), we get a palindrome (47396669374).

The spelling of 21152344262 in words is "twenty-one billion, one hundred fifty-two million, three hundred forty-four thousand, two hundred sixty-two".