21050526442563 has 12 divisors (see below), whose sum is σ = 30407544882000. Its totient is φ = 14033117106096.

The previous prime is 21050526442481. The next prime is 21050526442567. The reversal of 21050526442563 is 36524462505012.

21050526442563 is a `hidden beast` number, since 2 + 1 + 0 + 5 + 0 + 526 + 44 + 25 + 63 = 666.

It is not a de Polignac number, because 21050526442563 - 2³⁸ = 20775648535619 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21050526442567) by changing a digit.

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 in 11 ways as a sum of consecutive naturals, for example, 47030631 + ... + 47476112.

It is an arithmetic number, because the mean of its divisors is an integer number (2533962073500).

Almost surely, 2^{21050526442563} is an apocalyptic number.

21050526442563 is a deficient number, since it is larger than the sum of its proper divisors (9357018439437).

21050526442563 is a wasteful number, since it uses less digits than its factorization.

21050526442563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94531498 (or 94531495 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 45.

Adding to 21050526442563 its reverse (36524462505012), we get a palindrome (57574988947575).

The spelling of 21050526442563 in words is "twenty-one trillion, fifty billion, five hundred twenty-six million, four hundred forty-two thousand, five hundred sixty-three".