21424334352 has 20 divisors (see below), whose sum is σ = 55346197200. Its totient is φ = 7141444768.

The previous prime is 21424334341. The next prime is 21424334363. The reversal of 21424334352 is 25343342412.

It is an interprime number because it is at equal distance from previous prime (21424334341) and next prime (21424334363).

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 223170102 + ... + 223170197.

It is an arithmetic number, because the mean of its divisors is an integer number (2767309860).

Almost surely, 2^21424334352 is an apocalyptic number.

It is an amenable number.

21424334352 is an abundant number, since it is smaller than the sum of its proper divisors (33921862848).

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

21424334352 is a wasteful number, since it uses less digits than its factorization.

21424334352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446340310 (or 446340304 counting only the distinct ones).

The product of its digits is 69120, while the sum is 33.

Adding to 21424334352 its reverse (25343342412), we get a palindrome (46767676764).

The spelling of 21424334352 in words is "twenty-one billion, four hundred twenty-four million, three hundred thirty-four thousand, three hundred fifty-two".