21690002336 has 12 divisors (see below), whose sum is σ = 42702192162. Its totient is φ = 10845001152.

The previous prime is 21690002329. The next prime is 21690002353. The reversal of 21690002336 is 63320009612.

It can be written as a sum of positive squares in only one way, i.e., 19740250000 + 1949752336 = 140500^2 + 44156^2 .

It is a Harshad number since it is a multiple of its sum of digits (32), and also a Moran number because the ratio is a prime number: 677812573 = 21690002336 / (2 + 1 + 6 + 9 + 0 + 0 + 0 + 2 + 3 + 3 + 6).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 338906255 + ... + 338906318.

Almost surely, 2^21690002336 is an apocalyptic number.

It is an amenable number.

21690002336 is a deficient number, since it is larger than the sum of its proper divisors (21012189826).

21690002336 is an equidigital number, since it uses as much as digits as its factorization.

21690002336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 677812583 (or 677812575 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 32.

The spelling of 21690002336 in words is "twenty-one billion, six hundred ninety million, two thousand, three hundred thirty-six".