21727550547704 has 32 divisors (see below), whose sum is σ = 41153302713600. Its totient is φ = 10753501457760.

The previous prime is 21727550547667. The next prime is 21727550547709. The reversal of 21727550547704 is 40774505572712.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 21727550547704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21727550547709) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9256034 + ... + 11363505.

It is an arithmetic number, because the mean of its divisors is an integer number (1286040709800).

Almost surely, 2^{21727550547704} is an apocalyptic number.

It is an amenable number.

21727550547704 is a deficient number, since it is larger than the sum of its proper divisors (19425752165896).

21727550547704 is a wasteful number, since it uses less digits than its factorization.

21727550547704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20620883 (or 20620879 counting only the distinct ones).

The product of its (nonzero) digits is 19208000, while the sum is 56.

The spelling of 21727550547704 in words is "twenty-one trillion, seven hundred twenty-seven billion, five hundred fifty million, five hundred forty-seven thousand, seven hundred four".