21700892764 has 6 divisors (see below), whose sum is σ = 37976562344. Its totient is φ = 10850446380.

The previous prime is 21700892761. The next prime is 21700892777. The reversal of 21700892764 is 46729800712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21700892761) by changing a digit.

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 as a sum of consecutive naturals, namely, 2712611592 + ... + 2712611599.

Almost surely, 2^21700892764 is an apocalyptic number.

It is an amenable number.

21700892764 is a deficient number, since it is larger than the sum of its proper divisors (16275669580).

21700892764 is a wasteful number, since it uses less digits than its factorization.

21700892764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5425223195 (or 5425223193 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 46.

The spelling of 21700892764 in words is "twenty-one billion, seven hundred million, eight hundred ninety-two thousand, seven hundred sixty-four".