20455572247727 has 16 divisors (see below), whose sum is σ = 20975260372992. Its totient is φ = 19939546893120.

The previous prime is 20455572247657. The next prime is 20455572247793. The reversal of 20455572247727 is 72774227555402.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20455572247727 - 2⁸ = 20455572247471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20455575247727) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12347318 + ... + 13905660.

It is an arithmetic number, because the mean of its divisors is an integer number (1310953773312).

Almost surely, 2^{20455572247727} is an apocalyptic number.

20455572247727 is a deficient number, since it is larger than the sum of its proper divisors (519688125265).

20455572247727 is a wasteful number, since it uses less digits than its factorization.

20455572247727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1559518.

The product of its (nonzero) digits is 76832000, while the sum is 59.

The spelling of 20455572247727 in words is "twenty trillion, four hundred fifty-five billion, five hundred seventy-two million, two hundred forty-seven thousand, seven hundred twenty-seven".