21330032031 has 48 divisors (see below), whose sum is σ = 40082664960. Its totient is φ = 10598765760.

The previous prime is 21330032027. The next prime is 21330032033. The reversal of 21330032031 is 13023003312.

21330032031 is a `hidden beast` number, since 2 + 13 + 300 + 320 + 31 = 666.

It is not a de Polignac number, because 21330032031 - 2² = 21330032027 is a prime.

It is a super-2 number, since 2×21330032031² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21330031995 and 21330032013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21330032033) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 653176 + ... + 685053.

It is an arithmetic number, because the mean of its divisors is an integer number (835055520).

Almost surely, 2^21330032031 is an apocalyptic number.

21330032031 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21330032031 is a deficient number, since it is larger than the sum of its proper divisors (18752632929).

21330032031 is a wasteful number, since it uses less digits than its factorization.

21330032031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1338276 (or 1338273 counting only the distinct ones).

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

Adding to 21330032031 its reverse (13023003312), we get a palindrome (34353035343).

The spelling of 21330032031 in words is "twenty-one billion, three hundred thirty million, thirty-two thousand, thirty-one".