20552171444 has 12 divisors (see below), whose sum is σ = 41104342944. Its totient is φ = 8808073464.

The previous prime is 20552171417. The next prime is 20552171459. The reversal of 20552171444 is 44417125502.

20552171444 is an admirable number.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 367003034 + ... + 367003089.

It is an arithmetic number, because the mean of its divisors is an integer number (3425361912).

Almost surely, 2^20552171444 is an apocalyptic number.

It is an amenable number.

20552171444 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20552171444 is a wasteful number, since it uses less digits than its factorization.

20552171444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 734006134 (or 734006132 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 35.

Adding to 20552171444 its reverse (44417125502), we get a palindrome (64969296946).

The spelling of 20552171444 in words is "twenty billion, five hundred fifty-two million, one hundred seventy-one thousand, four hundred forty-four".