21034511333 has 64 divisors (see below), whose sum is σ = 25380864000. Its totient is φ = 17230752000.

The previous prime is 21034511321. The next prime is 21034511341. The reversal of 21034511333 is 33311543012.

It is not a de Polignac number, because 21034511333 - 2¹⁸ = 21034249189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21034511363) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 77617988 + ... + 77618258.

It is an arithmetic number, because the mean of its divisors is an integer number (396576000).

Almost surely, 2^21034511333 is an apocalyptic number.

21034511333 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21034511333 is a deficient number, since it is larger than the sum of its proper divisors (4346352667).

21034511333 is a wasteful number, since it uses less digits than its factorization.

21034511333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554.

The product of its (nonzero) digits is 3240, while the sum is 26.

It can be divided in two parts, 210 and 34511333, that added together give a palindrome (34511543).

The spelling of 21034511333 in words is "twenty-one billion, thirty-four million, five hundred eleven thousand, three hundred thirty-three".