21230230352 has 40 divisors (see below), whose sum is σ = 42187478400. Its totient is φ = 10345795200.

The previous prime is 21230230349. The next prime is 21230230391. The reversal of 21230230352 is 25303203212.

It is a congruent number.

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, 45149 + ... + 210947.

It is an arithmetic number, because the mean of its divisors is an integer number (1054686960).

Almost surely, 2^21230230352 is an apocalyptic number.

It is an amenable number.

21230230352 is a deficient number, since it is larger than the sum of its proper divisors (20957248048).

21230230352 is a wasteful number, since it uses less digits than its factorization.

21230230352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166011 (or 166005 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 23.

Adding to 21230230352 its reverse (25303203212), we get a palindrome (46533433564).

The spelling of 21230230352 in words is "twenty-one billion, two hundred thirty million, two hundred thirty thousand, three hundred fifty-two".