20103203045551 has 8 divisors (see below), whose sum is σ = 20135136201840. Its totient is φ = 20071274216448.

The previous prime is 20103203045503. The next prime is 20103203045579. The reversal of 20103203045551 is 15554030230102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20103203045551 - 2⁹ = 20103203045039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20103203015551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8281455 + ... + 10430191.

It is an arithmetic number, because the mean of its divisors is an integer number (2516892025230).

Almost surely, 2^{20103203045551} is an apocalyptic number.

20103203045551 is a deficient number, since it is larger than the sum of its proper divisors (31933156289).

20103203045551 is a wasteful number, since it uses less digits than its factorization.

20103203045551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2163593.

The product of its (nonzero) digits is 18000, while the sum is 31.

Adding to 20103203045551 its reverse (15554030230102), we get a palindrome (35657233275653).

The spelling of 20103203045551 in words is "twenty trillion, one hundred three billion, two hundred three million, forty-five thousand, five hundred fifty-one".