21013230033 has 40 divisors (see below), whose sum is σ = 31938133920. Its totient is φ = 13765308480.

The previous prime is 21013230023. The next prime is 21013230053. The reversal of 21013230033 is 33003231012.

It is not a de Polignac number, because 21013230033 - 2⁶ = 21013229969 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21013229988 and 21013230015.

It is not an unprimeable number, because it can be changed into a prime (21013230023) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2269293 + ... + 2278533.

It is an arithmetic number, because the mean of its divisors is an integer number (798453348).

Almost surely, 2^21013230033 is an apocalyptic number.

It is an amenable number.

21013230033 is a deficient number, since it is larger than the sum of its proper divisors (10924903887).

21013230033 is an equidigital number, since it uses as much as digits as its factorization.

21013230033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9739 (or 9730 counting only the distinct ones).

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

Adding to 21013230033 its reverse (33003231012), we get a palindrome (54016461045).

The spelling of 21013230033 in words is "twenty-one billion, thirteen million, two hundred thirty thousand, thirty-three".