21033807104 has 18 divisors (see below), whose sum is σ = 41985451410. Its totient is φ = 10516903424.

The previous prime is 21033807071. The next prime is 21033807121. The reversal of 21033807104 is 40170833012.

It can be written as a sum of positive squares in only one way, i.e., 13014246400 + 8019560704 = 114080^2 + 89552^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41081399 + ... + 41081910.

Almost surely, 2^21033807104 is an apocalyptic number.

It is an amenable number.

21033807104 is a deficient number, since it is larger than the sum of its proper divisors (20951644306).

21033807104 is an frugal number, since it uses more digits than its factorization.

21033807104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82163325 (or 82163311 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The spelling of 21033807104 in words is "twenty-one billion, thirty-three million, eight hundred seven thousand, one hundred four".