21112550534 has 8 divisors (see below), whose sum is σ = 31669905000. Its totient is φ = 10555915536.

The previous prime is 21112550519. The next prime is 21112550551. The reversal of 21112550534 is 43505521112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21112550497 and 21112550506.

It is a congruent number.

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 in 3 ways as a sum of consecutive naturals, for example, 99284 + ... + 228215.

It is an arithmetic number, because the mean of its divisors is an integer number (3958738125).

Almost surely, 2^21112550534 is an apocalyptic number.

21112550534 is a deficient number, since it is larger than the sum of its proper divisors (10557354466).

21112550534 is a wasteful number, since it uses less digits than its factorization.

21112550534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359734.

The product of its (nonzero) digits is 6000, while the sum is 29.

The spelling of 21112550534 in words is "twenty-one billion, one hundred twelve million, five hundred fifty thousand, five hundred thirty-four".