21521450463733 has 12 divisors (see below), whose sum is σ = 23655956113440. Its totient is φ = 19564833449480.

The previous prime is 21521450463701. The next prime is 21521450463743. The reversal of 21521450463733 is 33736405412512.

It is not a de Polignac number, because 21521450463733 - 2⁵ = 21521450463701 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 (21521450463743) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23220216 + ... + 24129262.

It is an arithmetic number, because the mean of its divisors is an integer number (1971329676120).

Almost surely, 2^{21521450463733} is an apocalyptic number.

It is an amenable number.

21521450463733 is a deficient number, since it is larger than the sum of its proper divisors (2134505649707).

21521450463733 is a wasteful number, since it uses less digits than its factorization.

21521450463733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1104728 (or 1104717 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 46.

The spelling of 21521450463733 in words is "twenty-one trillion, five hundred twenty-one billion, four hundred fifty million, four hundred sixty-three thousand, seven hundred thirty-three".