21230400032 has 24 divisors (see below), whose sum is σ = 41806743552. Its totient is φ = 10612814400.

The previous prime is 21230400031. The next prime is 21230400043. The reversal of 21230400032 is 23000403212.

It is not an unprimeable number, because it can be changed into a prime (21230400031) 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, 74657 + ... + 219167.

It is an arithmetic number, because the mean of its divisors is an integer number (1741947648).

Almost surely, 2^21230400032 is an apocalyptic number.

It is an amenable number.

21230400032 is a deficient number, since it is larger than the sum of its proper divisors (20576343520).

21230400032 is a wasteful number, since it uses less digits than its factorization.

21230400032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149112 (or 149104 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

Adding to 21230400032 its reverse (23000403212), we get a palindrome (44230803244).

The spelling of 21230400032 in words is "twenty-one billion, two hundred thirty million, four hundred thousand, thirty-two".