21352525200556 has 24 divisors (see below), whose sum is σ = 40851954791424. Its totient is φ = 9684730643280.

The previous prime is 21352525200491. The next prime is 21352525200577. The reversal of 21352525200556 is 65500252525312.

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, 524045140 + ... + 524085883.

It is an arithmetic number, because the mean of its divisors is an integer number (1702164782976).

Almost surely, 2^{21352525200556} is an apocalyptic number.

It is an amenable number.

21352525200556 is a deficient number, since it is larger than the sum of its proper divisors (19499429590868).

21352525200556 is a wasteful number, since it uses less digits than its factorization.

21352525200556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1048131501 (or 1048131499 counting only the distinct ones).

The product of its (nonzero) digits is 900000, while the sum is 43.

Adding to 21352525200556 its reverse (65500252525312), we get a palindrome (86852777725868).

The spelling of 21352525200556 in words is "twenty-one trillion, three hundred fifty-two billion, five hundred twenty-five million, two hundred thousand, five hundred fifty-six".