21832163338 has 4 divisors (see below), whose sum is σ = 32748245010. Its totient is φ = 10916081668.

The previous prime is 21832163329. The next prime is 21832163341. The reversal of 21832163338 is 83336123812.

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., 11821560529 + 10010602809 = 108727^2 + 100053^2 .

It is a super-2 number, since 2×21832163338² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21832163338.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5458040833 + ... + 5458040836.

Almost surely, 2^21832163338 is an apocalyptic number.

21832163338 is a deficient number, since it is larger than the sum of its proper divisors (10916081672).

21832163338 is a wasteful number, since it uses less digits than its factorization.

21832163338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10916081671.

The product of its digits is 124416, while the sum is 40.

The spelling of 21832163338 in words is "twenty-one billion, eight hundred thirty-two million, one hundred sixty-three thousand, three hundred thirty-eight".