21002232232 has 32 divisors (see below), whose sum is σ = 39606779520. Its totient is φ = 10440576000.

The previous prime is 21002232131. The next prime is 21002232287. The reversal of 21002232232 is 23223220012.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1149553 + ... + 1167679.

It is an arithmetic number, because the mean of its divisors is an integer number (1237711860).

Almost surely, 2^21002232232 is an apocalyptic number.

It is an amenable number.

21002232232 is a deficient number, since it is larger than the sum of its proper divisors (18604547288).

21002232232 is a wasteful number, since it uses less digits than its factorization.

21002232232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18961 (or 18957 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 21002232232 its reverse (23223220012), we get a palindrome (44225452244).

The spelling of 21002232232 in words is "twenty-one billion, two million, two hundred thirty-two thousand, two hundred thirty-two".