21163054694 has 16 divisors (see below), whose sum is σ = 32016772800. Its totient is φ = 10491184704.

The previous prime is 21163054681. The next prime is 21163054711. The reversal of 21163054694 is 49645036112.

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 7 ways as a sum of consecutive naturals, for example, 12794 + ... + 206130.

It is an arithmetic number, because the mean of its divisors is an integer number (2001048300).

Almost surely, 2^21163054694 is an apocalyptic number.

21163054694 is a deficient number, since it is larger than the sum of its proper divisors (10853718106).

21163054694 is a wasteful number, since it uses less digits than its factorization.

21163054694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193807.

The product of its (nonzero) digits is 155520, while the sum is 41.

The spelling of 21163054694 in words is "twenty-one billion, one hundred sixty-three million, fifty-four thousand, six hundred ninety-four".