21032156343 has 64 divisors (see below), whose sum is σ = 33120460800. Its totient is φ = 11733984000.

The previous prime is 21032156323. The next prime is 21032156351. The reversal of 21032156343 is 34365123012.

It is not a de Polignac number, because 21032156343 - 2⁹ = 21032155831 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21032156343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21032156323) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6965088 + ... + 6968106.

It is an arithmetic number, because the mean of its divisors is an integer number (517507200).

Almost surely, 2^21032156343 is an apocalyptic number.

21032156343 is a deficient number, since it is larger than the sum of its proper divisors (12088304457).

21032156343 is a wasteful number, since it uses less digits than its factorization.

21032156343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3364.

The product of its (nonzero) digits is 12960, while the sum is 30.

Adding to 21032156343 its reverse (34365123012), we get a palindrome (55397279355).

The spelling of 21032156343 in words is "twenty-one billion, thirty-two million, one hundred fifty-six thousand, three hundred forty-three".