21012432352 has 24 divisors (see below), whose sum is σ = 41391488376. Its totient is φ = 10500308352.

The previous prime is 21012432317. The next prime is 21012432373. The reversal of 21012432352 is 25323421012.

It is a super-3 number, since 3×21012432352³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126543 + ... + 240910.

It is an arithmetic number, because the mean of its divisors is an integer number (1724645349).

Almost surely, 2^21012432352 is an apocalyptic number.

It is an amenable number.

21012432352 is a deficient number, since it is larger than the sum of its proper divisors (20379056024).

21012432352 is a wasteful number, since it uses less digits than its factorization.

21012432352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369250 (or 369242 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 21012432352 its reverse (25323421012), we get a palindrome (46335853364).

The spelling of 21012432352 in words is "twenty-one billion, twelve million, four hundred thirty-two thousand, three hundred fifty-two".