21750097706 has 16 divisors (see below), whose sum is σ = 34685967744. Its totient is φ = 10205951184.

The previous prime is 21750097609. The next prime is 21750097709. The reversal of 21750097706 is 60779005712.

It is not an unprimeable number, because it can be changed into a prime (21750097709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4458206 + ... + 4463081.

It is an arithmetic number, because the mean of its divisors is an integer number (2167872984).

Almost surely, 2^21750097706 is an apocalyptic number.

21750097706 is a deficient number, since it is larger than the sum of its proper divisors (12935870038).

21750097706 is a wasteful number, since it uses less digits than its factorization.

21750097706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8921365.

The product of its (nonzero) digits is 185220, while the sum is 44.

The spelling of 21750097706 in words is "twenty-one billion, seven hundred fifty million, ninety-seven thousand, seven hundred six".