21547161004214 has 4 divisors (see below), whose sum is σ = 32320741506324. Its totient is φ = 10773580502106.

The previous prime is 21547161004211. The next prime is 21547161004219. The reversal of 21547161004214 is 41240016174512.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21547161004211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5386790251052 + ... + 5386790251055.

It is an arithmetic number, because the mean of its divisors is an integer number (8080185376581).

Almost surely, 2^{21547161004214} is an apocalyptic number.

21547161004214 is a deficient number, since it is larger than the sum of its proper divisors (10773580502110).

21547161004214 is a wasteful number, since it uses less digits than its factorization.

21547161004214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10773580502109.

The product of its (nonzero) digits is 53760, while the sum is 38.

Adding to 21547161004214 its reverse (41240016174512), we get a palindrome (62787177178726).

The spelling of 21547161004214 in words is "twenty-one trillion, five hundred forty-seven billion, one hundred sixty-one million, four thousand, two hundred fourteen".