21223232036 has 6 divisors (see below), whose sum is σ = 37140656070. Its totient is φ = 10611616016.

The previous prime is 21223232033. The next prime is 21223232071. The reversal of 21223232036 is 63023232212.

It can be written as a sum of positive squares in only one way, i.e., 20967040000 + 256192036 = 144800^2 + 16006^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21223231996 and 21223232014.

It is not an unprimeable number, because it can be changed into a prime (21223232033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2652904001 + ... + 2652904008.

It is an arithmetic number, because the mean of its divisors is an integer number (6190109345).

Almost surely, 2^21223232036 is an apocalyptic number.

It is an amenable number.

21223232036 is a deficient number, since it is larger than the sum of its proper divisors (15917424034).

21223232036 is a wasteful number, since it uses less digits than its factorization.

21223232036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5305808013 (or 5305808011 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 26.

Adding to 21223232036 its reverse (63023232212), we get a palindrome (84246464248).

The spelling of 21223232036 in words is "twenty-one billion, two hundred twenty-three million, two hundred thirty-two thousand, thirty-six".