21343535445 has 64 divisors (see below), whose sum is σ = 36644555520. Its totient is φ = 10570137600.

The previous prime is 21343535443. The next prime is 21343535461. The reversal of 21343535445 is 54453534312.

It is not a de Polignac number, because 21343535445 - 2¹ = 21343535443 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21343535441) 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, 15681565 + ... + 15682925.

It is an arithmetic number, because the mean of its divisors is an integer number (572571180).

Almost surely, 2^21343535445 is an apocalyptic number.

It is an amenable number.

21343535445 is a deficient number, since it is larger than the sum of its proper divisors (15301020075).

21343535445 is a wasteful number, since it uses less digits than its factorization.

21343535445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2166.

The product of its digits is 432000, while the sum is 39.

The spelling of 21343535445 in words is "twenty-one billion, three hundred forty-three million, five hundred thirty-five thousand, four hundred forty-five".