20531443458 has 16 divisors (see below), whose sum is σ = 41194082016. Its totient is φ = 6821948640.

The previous prime is 20531443423. The next prime is 20531443459. The reversal of 20531443458 is 85434413502.

It is not an unprimeable number, because it can be changed into a prime (20531443459) 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, 5464428 + ... + 5468183.

It is an arithmetic number, because the mean of its divisors is an integer number (2574630126).

Almost surely, 2^20531443458 is an apocalyptic number.

20531443458 is an abundant number, since it is smaller than the sum of its proper divisors (20662638558).

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

20531443458 is a wasteful number, since it uses less digits than its factorization.

20531443458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10932929.

The product of its (nonzero) digits is 230400, while the sum is 39.

The spelling of 20531443458 in words is "twenty billion, five hundred thirty-one million, four hundred forty-three thousand, four hundred fifty-eight".