21433305104 has 10 divisors (see below), whose sum is σ = 41527028670. Its totient is φ = 10716652544.

The previous prime is 21433305097. The next prime is 21433305163. The reversal of 21433305104 is 40150333412.

It can be written as a sum of positive squares in only one way, i.e., 17756095504 + 3677209600 = 133252^2 + 60640^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 669790769 + ... + 669790800.

It is an arithmetic number, because the mean of its divisors is an integer number (4152702867).

Almost surely, 2^21433305104 is an apocalyptic number.

It is an amenable number.

21433305104 is a deficient number, since it is larger than the sum of its proper divisors (20093723566).

21433305104 is a wasteful number, since it uses less digits than its factorization.

21433305104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1339581577 (or 1339581571 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

Adding to 21433305104 its reverse (40150333412), we get a palindrome (61583638516).

The spelling of 21433305104 in words is "twenty-one billion, four hundred thirty-three million, three hundred five thousand, one hundred four".