21320322033 has 16 divisors (see below), whose sum is σ = 28629457920. Its totient is φ = 14112559056.

The previous prime is 21320322017. The next prime is 21320322043. The reversal of 21320322033 is 33022302312.

It is not a de Polignac number, because 21320322033 - 2⁴ = 21320322017 is a prime.

It is a super-2 number, since 2×21320322033² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21320322043) 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, 430948 + ... + 477866.

It is an arithmetic number, because the mean of its divisors is an integer number (1789341120).

Almost surely, 2^21320322033 is an apocalyptic number.

It is an amenable number.

21320322033 is a deficient number, since it is larger than the sum of its proper divisors (7309135887).

21320322033 is a wasteful number, since it uses less digits than its factorization.

21320322033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47996.

The product of its (nonzero) digits is 1296, while the sum is 21.

Adding to 21320322033 its reverse (33022302312), we get a palindrome (54342624345).

The spelling of 21320322033 in words is "twenty-one billion, three hundred twenty million, three hundred twenty-two thousand, thirty-three".