21500440225034 has 4 divisors (see below), whose sum is σ = 32250660337554. Its totient is φ = 10750220112516.

The previous prime is 21500440225003. The next prime is 21500440225063. The reversal of 21500440225034 is 43052204400512.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 18727559176225 + 2772881048809 = 4327535^2 + 1665197^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5375110056257 + ... + 5375110056260.

Almost surely, 2^{21500440225034} is an apocalyptic number.

21500440225034 is a deficient number, since it is larger than the sum of its proper divisors (10750220112520).

21500440225034 is a wasteful number, since it uses less digits than its factorization.

21500440225034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10750220112519.

The product of its (nonzero) digits is 38400, while the sum is 32.

Adding to 21500440225034 its reverse (43052204400512), we get a palindrome (64552644625546).

The spelling of 21500440225034 in words is "twenty-one trillion, five hundred billion, four hundred forty million, two hundred twenty-five thousand, thirty-four".