20120103550 has 12 divisors (see below), whose sum is σ = 37423392696. Its totient is φ = 8048041400.

The previous prime is 20120103541. The next prime is 20120103559. The reversal of 20120103550 is 5530102102.

It is an interprime number because it is at equal distance from previous prime (20120103541) and next prime (20120103559).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20120103559) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 201200986 + ... + 201201085.

It is an arithmetic number, because the mean of its divisors is an integer number (3118616058).

Almost surely, 2^20120103550 is an apocalyptic number.

20120103550 is a deficient number, since it is larger than the sum of its proper divisors (17303289146).

20120103550 is a wasteful number, since it uses less digits than its factorization.

20120103550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402402083 (or 402402078 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 19.

Adding to 20120103550 its reverse (5530102102), we get a palindrome (25650205652).

The spelling of 20120103550 in words is "twenty billion, one hundred twenty million, one hundred three thousand, five hundred fifty".