21134074433 has 16 divisors (see below), whose sum is σ = 23616645120. Its totient is φ = 18794693376.

The previous prime is 21134074427. The next prime is 21134074459. The reversal of 21134074433 is 33447043112.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21134074433 - 2¹⁸ = 21133812289 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21134074433.

It is not an unprimeable number, because it can be changed into a prime (21134074483) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38291 + ... + 209127.

It is an arithmetic number, because the mean of its divisors is an integer number (1476040320).

Almost surely, 2^21134074433 is an apocalyptic number.

It is an amenable number.

21134074433 is a deficient number, since it is larger than the sum of its proper divisors (2482570687).

21134074433 is a wasteful number, since it uses less digits than its factorization.

21134074433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171256.

The product of its (nonzero) digits is 24192, while the sum is 32.

The spelling of 21134074433 in words is "twenty-one billion, one hundred thirty-four million, seventy-four thousand, four hundred thirty-three".