20531203544 has 16 divisors (see below), whose sum is σ = 39823455600. Its totient is φ = 9911615392.

The previous prime is 20531203513. The next prime is 20531203591. The reversal of 20531203544 is 44530213502.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44248052 + ... + 44248515.

It is an arithmetic number, because the mean of its divisors is an integer number (2488965975).

Almost surely, 2^20531203544 is an apocalyptic number.

It is an amenable number.

20531203544 is a deficient number, since it is larger than the sum of its proper divisors (19292252056).

20531203544 is a wasteful number, since it uses less digits than its factorization.

20531203544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88496602 (or 88496598 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 29.

The spelling of 20531203544 in words is "twenty billion, five hundred thirty-one million, two hundred three thousand, five hundred forty-four".