20544231543 has 16 divisors (see below), whose sum is σ = 29896643712. Its totient is φ = 12445164000.

The previous prime is 20544231509. The next prime is 20544231571. The reversal of 20544231543 is 34513244502.

It is not a de Polignac number, because 20544231543 - 2⁸ = 20544231287 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20544231503) 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, 75748 + ... + 216393.

It is an arithmetic number, because the mean of its divisors is an integer number (1868540232).

Almost surely, 2^20544231543 is an apocalyptic number.

20544231543 is a deficient number, since it is larger than the sum of its proper divisors (9352412169).

20544231543 is a wasteful number, since it uses less digits than its factorization.

20544231543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294286.

The product of its (nonzero) digits is 57600, while the sum is 33.

The spelling of 20544231543 in words is "twenty billion, five hundred forty-four million, two hundred thirty-one thousand, five hundred forty-three".