20531443398 has 8 divisors (see below), whose sum is σ = 41062886808. Its totient is φ = 6843814464.

The previous prime is 20531443381. The next prime is 20531443411. The reversal of 20531443398 is 89334413502.

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

20531443398 is an admirable number.

It is a congruent number.

It is an unprimeable number.

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, 1710953611 + ... + 1710953622.

It is an arithmetic number, because the mean of its divisors is an integer number (5132860851).

Almost surely, 2^20531443398 is an apocalyptic number.

20531443398 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.

20531443398 is a wasteful number, since it uses less digits than its factorization.

20531443398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3421907238.

The product of its (nonzero) digits is 311040, while the sum is 42.

The spelling of 20531443398 in words is "twenty billion, five hundred thirty-one million, four hundred forty-three thousand, three hundred ninety-eight".