21342002243 has 8 divisors (see below), whose sum is σ = 22277944608. Its totient is φ = 20406729024.

The previous prime is 21342002221. The next prime is 21342002261. The reversal of 21342002243 is 34220024312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21342002243 - 2¹⁴ = 21341985859 is a prime.

It is a super-3 number, since 3×21342002243³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21342002293) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101546 + ... + 230207.

It is an arithmetic number, because the mean of its divisors is an integer number (2784743076).

Almost surely, 2^21342002243 is an apocalyptic number.

21342002243 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21342002243 is a deficient number, since it is larger than the sum of its proper divisors (935942365).

21342002243 is a wasteful number, since it uses less digits than its factorization.

21342002243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334573.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 21342002243 its reverse (34220024312), we get a palindrome (55562026555).

The spelling of 21342002243 in words is "twenty-one billion, three hundred forty-two million, two thousand, two hundred forty-three".