21533520002 has 16 divisors (see below), whose sum is σ = 34031639040. Its totient is φ = 10190685168.

The previous prime is 21533519993. The next prime is 21533520031. The reversal of 21533520002 is 20002533512.

It is a self number, because there is not a number n which added to its sum of digits gives 21533520002.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 219353 + ... + 301964.

It is an arithmetic number, because the mean of its divisors is an integer number (2126977440).

Almost surely, 2^21533520002 is an apocalyptic number.

21533520002 is a deficient number, since it is larger than the sum of its proper divisors (12498119038).

21533520002 is a wasteful number, since it uses less digits than its factorization.

21533520002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522425.

The product of its (nonzero) digits is 1800, while the sum is 23.

The spelling of 21533520002 in words is "twenty-one billion, five hundred thirty-three million, five hundred twenty thousand, two".