21611241737194 has 4 divisors (see below), whose sum is σ = 32416862605794. Its totient is φ = 10805620868596.

The previous prime is 21611241737117. The next prime is 21611241737221. The reversal of 21611241737194 is 49173714211612.

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., 15067944245025 + 6543297492169 = 3881745^2 + 2557987^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5402810434297 + ... + 5402810434300.

Almost surely, 2^{21611241737194} is an apocalyptic number.

21611241737194 is a deficient number, since it is larger than the sum of its proper divisors (10805620868600).

21611241737194 is a wasteful number, since it uses less digits than its factorization.

21611241737194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10805620868599.

The product of its digits is 508032, while the sum is 49.

The spelling of 21611241737194 in words is "twenty-one trillion, six hundred eleven billion, two hundred forty-one million, seven hundred thirty-seven thousand, one hundred ninety-four".