21030300033 has 16 divisors (see below), whose sum is σ = 29313684096. Its totient is φ = 13385813760.

The previous prime is 21030300029. The next prime is 21030300059. The reversal of 21030300033 is 33000303012.

It is not a de Polignac number, because 21030300033 - 2² = 21030300029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21030299985 and 21030300021.

It is not an unprimeable number, because it can be changed into a prime (21030300013) 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, 244360 + ... + 319017.

It is an arithmetic number, because the mean of its divisors is an integer number (1832105256).

Almost surely, 2^21030300033 is an apocalyptic number.

21030300033 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21030300033 is a deficient number, since it is larger than the sum of its proper divisors (8283384063).

21030300033 is a wasteful number, since it uses less digits than its factorization.

21030300033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 563944.

The product of its (nonzero) digits is 162, while the sum is 15.

Adding to 21030300033 its reverse (33000303012), we get a palindrome (54030603045).

The spelling of 21030300033 in words is "twenty-one billion, thirty million, three hundred thousand, thirty-three".