21045531500352 has 42 divisors (see below), whose sum is σ = 60323216159778. Its totient is φ = 7015177166592.

The previous prime is 21045531500333. The next prime is 21045531500363. The reversal of 21045531500352 is 25300513554012.

21045531500352 is a `hidden beast` number, since 2 + 1 + 0 + 4 + 553 + 1 + 50 + 0 + 3 + 52 = 666.

It can be written as a sum of positive squares in only one way, i.e., 12815426258496 + 8230105241856 = 3579864^2 + 2868816^2 .

It is a super-2 number, since 2×21045531500352² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18268689963 + ... + 18268691114.

Almost surely, 2^{21045531500352} is an apocalyptic number.

It is an amenable number.

21045531500352 is an abundant number, since it is smaller than the sum of its proper divisors (39277684659426).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21045531500352 is a wasteful number, since it uses less digits than its factorization.

21045531500352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36537381095 (or 36537381082 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 36.

The spelling of 21045531500352 in words is "twenty-one trillion, forty-five billion, five hundred thirty-one million, five hundred thousand, three hundred fifty-two".