21383892202 has 4 divisors (see below), whose sum is σ = 32075838306. Its totient is φ = 10691946100.

The previous prime is 21383892193. The next prime is 21383892203. The reversal of 21383892202 is 20229838312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 10851180561 + 10532711641 = 104169^2 + 102629^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (21383892203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5345973049 + ... + 5345973052.

Almost surely, 2^21383892202 is an apocalyptic number.

21383892202 is a deficient number, since it is larger than the sum of its proper divisors (10691946104).

21383892202 is a wasteful number, since it uses less digits than its factorization.

21383892202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10691946103.

The product of its (nonzero) digits is 82944, while the sum is 40.

The spelling of 21383892202 in words is "twenty-one billion, three hundred eighty-three million, eight hundred ninety-two thousand, two hundred two".