21335473711 has 4 divisors (see below), whose sum is σ = 22458393400. Its totient is φ = 20212554024.

The previous prime is 21335473667. The next prime is 21335473721. The reversal of 21335473711 is 11737453312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21335473711 - 2²⁷ = 21201255983 is a prime.

It is a super-2 number, since 2×21335473711² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21335473721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 561459816 + ... + 561459853.

It is an arithmetic number, because the mean of its divisors is an integer number (5614598350).

Almost surely, 2^21335473711 is an apocalyptic number.

21335473711 is a deficient number, since it is larger than the sum of its proper divisors (1122919689).

21335473711 is a wasteful number, since it uses less digits than its factorization.

21335473711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1122919688.

The product of its digits is 52920, while the sum is 37.

The spelling of 21335473711 in words is "twenty-one billion, three hundred thirty-five million, four hundred seventy-three thousand, seven hundred eleven".