21116757406 has 16 divisors (see below), whose sum is σ = 32045742288. Its totient is φ = 10435216000.

The previous prime is 21116757379. The next prime is 21116757461. The reversal of 21116757406 is 60475761112.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20886 + ... + 206566.

It is an arithmetic number, because the mean of its divisors is an integer number (2002858893).

Almost surely, 2^21116757406 is an apocalyptic number.

21116757406 is a deficient number, since it is larger than the sum of its proper divisors (10928984882).

21116757406 is a wasteful number, since it uses less digits than its factorization.

21116757406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186347.

The product of its (nonzero) digits is 70560, while the sum is 40.

The spelling of 21116757406 in words is "twenty-one billion, one hundred sixteen million, seven hundred fifty-seven thousand, four hundred six".