20501413344 has 72 divisors (see below), whose sum is σ = 58867007472. Its totient is φ = 6767447040.

The previous prime is 20501413333. The next prime is 20501413357. The reversal of 20501413344 is 44331410502.

It is a happy number.

20501413344 is a `hidden beast` number, since 20 + 501 + 4 + 133 + 4 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 315897 + ... + 375224.

It is an arithmetic number, because the mean of its divisors is an integer number (817597326).

Almost surely, 2^20501413344 is an apocalyptic number.

20501413344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20501413344 is an abundant number, since it is smaller than the sum of its proper divisors (38365594128).

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

20501413344 is a wasteful number, since it uses less digits than its factorization.

20501413344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691240 (or 691229 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 20501413344 its reverse (44331410502), we get a palindrome (64832823846).

The spelling of 20501413344 in words is "twenty billion, five hundred one million, four hundred thirteen thousand, three hundred forty-four".