21363072044 has 12 divisors (see below), whose sum is σ = 37398761904. Its totient is φ = 10677711504.

The previous prime is 21363072023. The next prime is 21363072061. The reversal of 21363072044 is 44027036312.

It is a self number, because there is not a number n which added to its sum of digits gives 21363072044.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 943544 + ... + 965919.

It is an arithmetic number, because the mean of its divisors is an integer number (3116563492).

Almost surely, 2^21363072044 is an apocalyptic number.

It is an amenable number.

21363072044 is a deficient number, since it is larger than the sum of its proper divisors (16035689860).

21363072044 is a wasteful number, since it uses less digits than its factorization.

21363072044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1912264 (or 1912262 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 32.

The spelling of 21363072044 in words is "twenty-one billion, three hundred sixty-three million, seventy-two thousand, forty-four".