21346400032 has 24 divisors (see below), whose sum is σ = 42177459996. Its totient is φ = 10634664192.

The previous prime is 21346400029. The next prime is 21346400063. The reversal of 21346400032 is 23000464312.

It can be written as a sum of positive squares in 2 ways, for example, as 21151630096 + 194769936 = 145436^2 + 13956^2 .

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, 1195243 + ... + 1212970.

Almost surely, 2^21346400032 is an apocalyptic number.

It is an amenable number.

21346400032 is a deficient number, since it is larger than the sum of its proper divisors (20831059964).

21346400032 is a wasteful number, since it uses less digits than its factorization.

21346400032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2408500 (or 2408492 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 21346400032 its reverse (23000464312), we get a palindrome (44346864344).

The spelling of 21346400032 in words is "twenty-one billion, three hundred forty-six million, four hundred thousand, thirty-two".