20544566631 has 8 divisors (see below), whose sum is σ = 28060871664. Its totient is φ = 13362319680.

The previous prime is 20544566629. The next prime is 20544566659. The reversal of 20544566631 is 13666544502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20544566631 - 2¹ = 20544566629 is a prime.

It is a super-2 number, since 2×20544566631² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20544566611) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 83514376 + ... + 83514621.

It is an arithmetic number, because the mean of its divisors is an integer number (3507608958).

Almost surely, 2^20544566631 is an apocalyptic number.

20544566631 is a deficient number, since it is larger than the sum of its proper divisors (7516305033).

20544566631 is a wasteful number, since it uses less digits than its factorization.

20544566631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167029041.

The product of its (nonzero) digits is 518400, while the sum is 42.

The spelling of 20544566631 in words is "twenty billion, five hundred forty-four million, five hundred sixty-six thousand, six hundred thirty-one".