21116550435 has 32 divisors (see below), whose sum is σ = 34070587200. Its totient is φ = 11167715328.

The previous prime is 21116550359. The next prime is 21116550437. The reversal of 21116550435 is 53405561112.

It is not a de Polignac number, because 21116550435 - 2⁷ = 21116550307 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21116550396 and 21116550405.

It is not an unprimeable number, because it can be changed into a prime (21116550437) 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 31 ways as a sum of consecutive naturals, for example, 1371339 + ... + 1386651.

It is an arithmetic number, because the mean of its divisors is an integer number (1064705850).

Almost surely, 2^21116550435 is an apocalyptic number.

21116550435 is a deficient number, since it is larger than the sum of its proper divisors (12954036765).

21116550435 is a wasteful number, since it uses less digits than its factorization.

21116550435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16087.

The product of its (nonzero) digits is 18000, while the sum is 33.

The spelling of 21116550435 in words is "twenty-one billion, one hundred sixteen million, five hundred fifty thousand, four hundred thirty-five".