21002350343 has 8 divisors (see below), whose sum is σ = 22619111088. Its totient is φ = 19385760384.

The previous prime is 21002350331. The next prime is 21002350349. The reversal of 21002350343 is 34305320012.

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

It is a cyclic number.

It is not a de Polignac number, because 21002350343 - 2⁸ = 21002350087 is a prime.

It is a super-2 number, since 2×21002350343² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21002350349) 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, 339455 + ... + 396527.

It is an arithmetic number, because the mean of its divisors is an integer number (2827388886).

Almost surely, 2^21002350343 is an apocalyptic number.

21002350343 is a deficient number, since it is larger than the sum of its proper divisors (1616760745).

21002350343 is a wasteful number, since it uses less digits than its factorization.

21002350343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85393.

The product of its (nonzero) digits is 2160, while the sum is 23.

Adding to 21002350343 its reverse (34305320012), we get a palindrome (55307670355).

The spelling of 21002350343 in words is "twenty-one billion, two million, three hundred fifty thousand, three hundred forty-three".