21320000342 has 16 divisors (see below), whose sum is σ = 32913881280. Its totient is φ = 10353060552.

The previous prime is 21320000341. The next prime is 21320000347. The reversal of 21320000342 is 24300002312.

It is a super-3 number, since 3×21320000342³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21320000342.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21320000341) 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 7 ways as a sum of consecutive naturals, for example, 1078628 + ... + 1098215.

It is an arithmetic number, because the mean of its divisors is an integer number (2057117580).

Almost surely, 2^21320000342 is an apocalyptic number.

21320000342 is a deficient number, since it is larger than the sum of its proper divisors (11593880938).

21320000342 is a wasteful number, since it uses less digits than its factorization.

21320000342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2176987.

The product of its (nonzero) digits is 288, while the sum is 17.

Adding to 21320000342 its reverse (24300002312), we get a palindrome (45620002654).

The spelling of 21320000342 in words is "twenty-one billion, three hundred twenty million, three hundred forty-two", and thus it is an aban number.