21034553339 has 8 divisors (see below), whose sum is σ = 22387281840. Its totient is φ = 19694647296.

The previous prime is 21034553311. The next prime is 21034553341. The reversal of 21034553339 is 93335543012.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21034553339 - 2⁸ = 21034553083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21034553359) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3202229 + ... + 3208790.

It is an arithmetic number, because the mean of its divisors is an integer number (2798410230).

Almost surely, 2^21034553339 is an apocalyptic number.

21034553339 is a deficient number, since it is larger than the sum of its proper divisors (1352728501).

21034553339 is a wasteful number, since it uses less digits than its factorization.

21034553339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6411229.

The product of its (nonzero) digits is 145800, while the sum is 38.

The spelling of 21034553339 in words is "twenty-one billion, thirty-four million, five hundred fifty-three thousand, three hundred thirty-nine".