21114204457706 has 4 divisors (see below), whose sum is σ = 31671306686562. Its totient is φ = 10557102228852.

The previous prime is 21114204457667. The next prime is 21114204457769. The reversal of 21114204457706 is 60775440241112.

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., 12640335855625 + 8473868602081 = 3555325^2 + 2910991^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5278551114425 + ... + 5278551114428.

Almost surely, 2^{21114204457706} is an apocalyptic number.

21114204457706 is a deficient number, since it is larger than the sum of its proper divisors (10557102228856).

21114204457706 is a wasteful number, since it uses less digits than its factorization.

21114204457706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10557102228855.

The product of its (nonzero) digits is 376320, while the sum is 44.

Adding to 21114204457706 its reverse (60775440241112), we get a palindrome (81889644698818).

The spelling of 21114204457706 in words is "twenty-one trillion, one hundred fourteen billion, two hundred four million, four hundred fifty-seven thousand, seven hundred six".