21455452525352 has 8 divisors (see below), whose sum is σ = 40228973485050. Its totient is φ = 10727726262672.

The previous prime is 21455452525327. The next prime is 21455452525361. The reversal of 21455452525352 is 25352525455412.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 19741013203396 + 1714439321956 = 4443086^2 + 1309366^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 21455452525352.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1340965782827 + ... + 1340965782842.

Almost surely, 2^{21455452525352} is an apocalyptic number.

It is an amenable number.

21455452525352 is a deficient number, since it is larger than the sum of its proper divisors (18773520959698).

21455452525352 is a wasteful number, since it uses less digits than its factorization.

21455452525352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2681931565675 (or 2681931565671 counting only the distinct ones).

The product of its digits is 12000000, while the sum is 50.

The spelling of 21455452525352 in words is "twenty-one trillion, four hundred fifty-five billion, four hundred fifty-two million, five hundred twenty-five thousand, three hundred fifty-two".