21320033031 has 64 divisors (see below), whose sum is σ = 36056494080. Its totient is φ = 12332736000.

The previous prime is 21320033029. The next prime is 21320033051. The reversal of 21320033031 is 13033002312.

It is not a de Polignac number, because 21320033031 - 2¹ = 21320033029 is a prime.

It is a super-2 number, since 2×21320033031² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21320032995 and 21320033013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21320033051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 656251 + ... + 687971.

It is an arithmetic number, because the mean of its divisors is an integer number (563382720).

Almost surely, 2^21320033031 is an apocalyptic number.

21320033031 is a deficient number, since it is larger than the sum of its proper divisors (14736461049).

21320033031 is a wasteful number, since it uses less digits than its factorization.

21320033031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31845 (or 31839 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

Adding to 21320033031 its reverse (13033002312), we get a palindrome (34353035343).

The spelling of 21320033031 in words is "twenty-one billion, three hundred twenty million, thirty-three thousand, thirty-one".