21194787714 has 16 divisors (see below), whose sum is σ = 42801125952. Its totient is φ = 6996337488.

The previous prime is 21194787703. The next prime is 21194787739. The reversal of 21194787714 is 41778749112.

It is a happy 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 7 ways as a sum of consecutive naturals, for example, 17147269 + ... + 17148504.

It is an arithmetic number, because the mean of its divisors is an integer number (2675070372).

Almost surely, 2^21194787714 is an apocalyptic number.

21194787714 is an abundant number, since it is smaller than the sum of its proper divisors (21606338238).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21194787714 is a wasteful number, since it uses less digits than its factorization.

21194787714 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34295881.

The product of its digits is 790272, while the sum is 51.

The spelling of 21194787714 in words is "twenty-one billion, one hundred ninety-four million, seven hundred eighty-seven thousand, seven hundred fourteen".