21214009533 has 16 divisors (see below), whose sum is σ = 29059920576. Its totient is φ = 13755651840.

The previous prime is 21214009519. The next prime is 21214009549. The reversal of 21214009533 is 33590041212.

It is not a de Polignac number, because 21214009533 - 2¹⁶ = 21213943997 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21214009533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21214009433) 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, 302485 + ... + 365957.

It is an arithmetic number, because the mean of its divisors is an integer number (1816245036).

Almost surely, 2^21214009533 is an apocalyptic number.

It is an amenable number.

21214009533 is a deficient number, since it is larger than the sum of its proper divisors (7845911043).

21214009533 is a wasteful number, since it uses less digits than its factorization.

21214009533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66524.

The product of its (nonzero) digits is 6480, while the sum is 30.

The spelling of 21214009533 in words is "twenty-one billion, two hundred fourteen million, nine thousand, five hundred thirty-three".