20531386055 has 8 divisors (see below), whose sum is σ = 24639014544. Its totient is φ = 16424208000.

The previous prime is 20531386037. The next prime is 20531386061. The reversal of 20531386055 is 55068313502.

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

It is not a de Polignac number, because 20531386055 - 2⁶ = 20531385991 is a prime.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 2546 + ... + 202655.

It is an arithmetic number, because the mean of its divisors is an integer number (3079876818).

Almost surely, 2^20531386055 is an apocalyptic number.

20531386055 is a deficient number, since it is larger than the sum of its proper divisors (4107628489).

20531386055 is a wasteful number, since it uses less digits than its factorization.

20531386055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225217.

The product of its (nonzero) digits is 108000, while the sum is 38.

Adding to 20531386055 its reverse (55068313502), we get a palindrome (75599699557).

The spelling of 20531386055 in words is "twenty billion, five hundred thirty-one million, three hundred eighty-six thousand, fifty-five".