21440331033 has 16 divisors (see below), whose sum is σ = 31193911296. Its totient is φ = 12990817040.

The previous prime is 21440331013. The next prime is 21440331067. The reversal of 21440331033 is 33013304412.

It is a cyclic number.

It is not a de Polignac number, because 21440331033 - 2⁵ = 21440331001 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21440330994 and 21440331012.

It is not an unprimeable number, because it can be changed into a prime (21440331013) 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, 51160 + ... + 213302.

It is an arithmetic number, because the mean of its divisors is an integer number (1949619456).

Almost surely, 2^21440331033 is an apocalyptic number.

It is an amenable number.

21440331033 is a deficient number, since it is larger than the sum of its proper divisors (9753580263).

21440331033 is a wasteful number, since it uses less digits than its factorization.

21440331033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166164.

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 21440331033 its reverse (33013304412), we get a palindrome (54453635445).

The spelling of 21440331033 in words is "twenty-one billion, four hundred forty million, three hundred thirty-one thousand, thirty-three".