20442013550 has 72 divisors (see below), whose sum is σ = 46557834840. Its totient is φ = 6639796800.

The previous prime is 20442013549. The next prime is 20442013621. The reversal of 20442013550 is 5531024402.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 173021 + ... + 266120.

It is an arithmetic number, because the mean of its divisors is an integer number (646636595).

Almost surely, 2^20442013550 is an apocalyptic number.

20442013550 is an abundant number, since it is smaller than the sum of its proper divisors (26115821290).

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

20442013550 is a wasteful number, since it uses less digits than its factorization.

20442013550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439186 (or 439174 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

Adding to 20442013550 its reverse (5531024402), we get a palindrome (25973037952).

The spelling of 20442013550 in words is "twenty billion, four hundred forty-two million, thirteen thousand, five hundred fifty".