20544573454 has 32 divisors (see below), whose sum is σ = 32430426336. Its totient is φ = 9748771200.

The previous prime is 20544573421. The next prime is 20544573463. The reversal of 20544573454 is 45437544502.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a self number, because there is not a number n which added to its sum of digits gives 20544573454.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2532004 + ... + 2540104.

It is an arithmetic number, because the mean of its divisors is an integer number (1013450823).

Almost surely, 2^20544573454 is an apocalyptic number.

20544573454 is a deficient number, since it is larger than the sum of its proper divisors (11885852882).

20544573454 is a wasteful number, since it uses less digits than its factorization.

20544573454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8980.

The product of its (nonzero) digits is 1344000, while the sum is 43.

The spelling of 20544573454 in words is "twenty billion, five hundred forty-four million, five hundred seventy-three thousand, four hundred fifty-four".