21362636936 has 16 divisors (see below), whose sum is σ = 40066609500. Its totient is φ = 10678207744.

The previous prime is 21362636929. The next prime is 21362636963. The reversal of 21362636936 is 63963626312.

It can be written as a sum of positive squares in 2 ways, for example, as 14712234436 + 6650402500 = 121294^2 + 81550^2 .

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 3 ways as a sum of consecutive naturals, for example, 359525 + ... + 414708.

Almost surely, 2^21362636936 is an apocalyptic number.

It is an amenable number.

21362636936 is a deficient number, since it is larger than the sum of its proper divisors (18703972564).

21362636936 is a wasteful number, since it uses less digits than its factorization.

21362636936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777688 (or 777684 counting only the distinct ones).

The product of its digits is 1259712, while the sum is 47.

The spelling of 21362636936 in words is "twenty-one billion, three hundred sixty-two million, six hundred thirty-six thousand, nine hundred thirty-six".