20443451101550 has 48 divisors (see below), whose sum is σ = 40267140863040. Its totient is φ = 7695293736960.

The previous prime is 20443451101517. The next prime is 20443451101573. The reversal of 20443451101550 is 5510115434402.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20443451101550.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4500566 + ... + 7819334.

It is an arithmetic number, because the mean of its divisors is an integer number (838898767980).

Almost surely, 2^{20443451101550} is an apocalyptic number.

20443451101550 is a deficient number, since it is larger than the sum of its proper divisors (19823689761490).

20443451101550 is a wasteful number, since it uses less digits than its factorization.

20443451101550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3326045 (or 3326040 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 35.

Adding to 20443451101550 its reverse (5510115434402), we get a palindrome (25953566535952).

The spelling of 20443451101550 in words is "twenty trillion, four hundred forty-three billion, four hundred fifty-one million, one hundred one thousand, five hundred fifty".