20531026506 has 8 divisors (see below), whose sum is σ = 41062053024. Its totient is φ = 6843675500.

The previous prime is 20531026493. The next prime is 20531026507. The reversal of 20531026506 is 60562013502.

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

20531026506 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (20531026507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1710918870 + ... + 1710918881.

It is an arithmetic number, because the mean of its divisors is an integer number (5132756628).

Almost surely, 2^20531026506 is an apocalyptic number.

20531026506 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20531026506 is a wasteful number, since it uses less digits than its factorization.

20531026506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3421837756.

The product of its (nonzero) digits is 10800, while the sum is 30.

The spelling of 20531026506 in words is "twenty billion, five hundred thirty-one million, twenty-six thousand, five hundred six".