20313021544 has 16 divisors (see below), whose sum is σ = 38090841120. Its totient is φ = 10155463920.

The previous prime is 20313021541. The next prime is 20313021563. The reversal of 20313021544 is 44512031302.

It is not an unprimeable number, because it can be changed into a prime (20313021541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45084 + ... + 206539.

It is an arithmetic number, because the mean of its divisors is an integer number (2380677570).

Almost surely, 2^20313021544 is an apocalyptic number.

It is an amenable number.

20313021544 is a deficient number, since it is larger than the sum of its proper divisors (17777819576).

20313021544 is a wasteful number, since it uses less digits than its factorization.

20313021544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261720 (or 261716 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 20313021544 its reverse (44512031302), we get a palindrome (64825052846).

The spelling of 20313021544 in words is "twenty billion, three hundred thirteen million, twenty-one thousand, five hundred forty-four".