20315243544 has 32 divisors (see below), whose sum is σ = 50800251120. Its totient is φ = 6770128896.

The previous prime is 20315243537. The next prime is 20315243573. The reversal of 20315243544 is 44534251302.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3504 + ... + 201600.

Almost surely, 2^20315243544 is an apocalyptic number.

20315243544 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20315243544 is an abundant number, since it is smaller than the sum of its proper divisors (30485007576).

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

20315243544 is a wasteful number, since it uses less digits than its factorization.

20315243544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202379 (or 202375 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 33.

Adding to 20315243544 its reverse (44534251302), we get a palindrome (64849494846).

The spelling of 20315243544 in words is "twenty billion, three hundred fifteen million, two hundred forty-three thousand, five hundred forty-four".