21893828836 has 12 divisors (see below), whose sum is σ = 41797309680. Its totient is φ = 9951740360.

The previous prime is 21893828773. The next prime is 21893828837. The reversal of 21893828836 is 63882839812.

It is a super-2 number, since 2×21893828836² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21893828837) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 248793466 + ... + 248793553.

It is an arithmetic number, because the mean of its divisors is an integer number (3483109140).

Almost surely, 2^21893828836 is an apocalyptic number.

It is an amenable number.

21893828836 is a deficient number, since it is larger than the sum of its proper divisors (19903480844).

21893828836 is a wasteful number, since it uses less digits than its factorization.

21893828836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497587034 (or 497587032 counting only the distinct ones).

The product of its digits is 7962624, while the sum is 58.

The spelling of 21893828836 in words is "twenty-one billion, eight hundred ninety-three million, eight hundred twenty-eight thousand, eight hundred thirty-six".