21035500343 has 16 divisors (see below), whose sum is σ = 26013724800. Its totient is φ = 16723104480.

The previous prime is 21035500309. The next prime is 21035500361. The reversal of 21035500343 is 34300553012.

It is a cyclic number.

It is not a de Polignac number, because 21035500343 - 2¹² = 21035496247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21035502343) 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 15 ways as a sum of consecutive naturals, for example, 3868373 + ... + 3873806.

It is an arithmetic number, because the mean of its divisors is an integer number (1625857800).

Almost surely, 2^21035500343 is an apocalyptic number.

21035500343 is a deficient number, since it is larger than the sum of its proper divisors (4978224457).

21035500343 is a wasteful number, since it uses less digits than its factorization.

21035500343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7742222.

The product of its (nonzero) digits is 5400, while the sum is 26.

It can be divided in two parts, 210 and 35500343, that added together give a palindrome (35500553).

The spelling of 21035500343 in words is "twenty-one billion, thirty-five million, five hundred thousand, three hundred forty-three".