20814548388454 has 16 divisors (see below), whose sum is σ = 31234584726576. Its totient is φ = 10403020648800.

The previous prime is 20814548388451. The next prime is 20814548388511. The reversal of 20814548388454 is 45488384541802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20814548388451) 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, 89131564 + ... + 89364784.

It is an arithmetic number, because the mean of its divisors is an integer number (1952161545411).

Almost surely, 2^{20814548388454} is an apocalyptic number.

20814548388454 is a deficient number, since it is larger than the sum of its proper divisors (10420036338122).

20814548388454 is a wasteful number, since it uses less digits than its factorization.

20814548388454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251271.

The product of its (nonzero) digits is 157286400, while the sum is 64.

The spelling of 20814548388454 in words is "twenty trillion, eight hundred fourteen billion, five hundred forty-eight million, three hundred eighty-eight thousand, four hundred fifty-four".