21034505433 has 32 divisors (see below), whose sum is σ = 30286835712. Its totient is φ = 12935936000.

The previous prime is 21034505413. The next prime is 21034505483. The reversal of 21034505433 is 33450543012.

It is a cyclic number.

It is not a de Polignac number, because 21034505433 - 2¹⁸ = 21034243289 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21034505433.

It is not an unprimeable number, because it can be changed into a prime (21034505413) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3107773 + ... + 3114533.

It is an arithmetic number, because the mean of its divisors is an integer number (946463616).

Almost surely, 2^21034505433 is an apocalyptic number.

It is an amenable number.

21034505433 is a deficient number, since it is larger than the sum of its proper divisors (9252330279).

21034505433 is a wasteful number, since it uses less digits than its factorization.

21034505433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7985.

The product of its (nonzero) digits is 21600, while the sum is 30.

The spelling of 21034505433 in words is "twenty-one billion, thirty-four million, five hundred five thousand, four hundred thirty-three".