20551301344 has 48 divisors (see below), whose sum is σ = 46253138400. Its totient is φ = 8805279744.

The previous prime is 20551301273. The next prime is 20551301369. The reversal of 20551301344 is 44310315502.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 977212 + ... + 998020.

It is an arithmetic number, because the mean of its divisors is an integer number (963607050).

Almost surely, 2^20551301344 is an apocalyptic number.

It is an amenable number.

20551301344 is an abundant number, since it is smaller than the sum of its proper divisors (25701837056).

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

20551301344 is a wasteful number, since it uses less digits than its factorization.

20551301344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25235 (or 25227 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 20551301344 its reverse (44310315502), we get a palindrome (64861616846).

The spelling of 20551301344 in words is "twenty billion, five hundred fifty-one million, three hundred one thousand, three hundred forty-four".