20041321550 has 24 divisors (see below), whose sum is σ = 37281988800. Its totient is φ = 8015425280.

The previous prime is 20041321493. The next prime is 20041321567. The reversal of 20041321550 is 5512314002.

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, 407171 + ... + 453729.

It is an arithmetic number, because the mean of its divisors is an integer number (1553416200).

Almost surely, 2^20041321550 is an apocalyptic number.

20041321550 is a deficient number, since it is larger than the sum of its proper divisors (17240667250).

20041321550 is a wasteful number, since it uses less digits than its factorization.

20041321550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55180 (or 55175 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

Adding to 20041321550 its reverse (5512314002), we get a palindrome (25553635552).

The spelling of 20041321550 in words is "twenty billion, forty-one million, three hundred twenty-one thousand, five hundred fifty".