20531304344 has 8 divisors (see below), whose sum is σ = 38496195660. Its totient is φ = 10265652168.

The previous prime is 20531304337. The next prime is 20531304383. The reversal of 20531304344 is 44340313502.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1283206514 + ... + 1283206529.

Almost surely, 2^20531304344 is an apocalyptic number.

It is an amenable number.

20531304344 is a deficient number, since it is larger than the sum of its proper divisors (17964891316).

20531304344 is a wasteful number, since it uses less digits than its factorization.

20531304344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2566413049 (or 2566413045 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 29.

Adding to 20531304344 its reverse (44340313502), we get a palindrome (64871617846).

The spelling of 20531304344 in words is "twenty billion, five hundred thirty-one million, three hundred four thousand, three hundred forty-four".