20055100403 has 4 divisors (see below), whose sum is σ = 21597800448. Its totient is φ = 18512400360.

The previous prime is 20055100397. The next prime is 20055100409. The reversal of 20055100403 is 30400155002.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (20055100397) and next prime (20055100409).

It is a cyclic number.

It is not a de Polignac number, because 20055100403 - 2⁸ = 20055100147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20055100409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 771350003 + ... + 771350028.

It is an arithmetic number, because the mean of its divisors is an integer number (5399450112).

Almost surely, 2^20055100403 is an apocalyptic number.

20055100403 is a deficient number, since it is larger than the sum of its proper divisors (1542700045).

20055100403 is a wasteful number, since it uses less digits than its factorization.

20055100403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1542700044.

The product of its (nonzero) digits is 600, while the sum is 20.

Adding to 20055100403 its reverse (30400155002), we get a palindrome (50455255405).

The spelling of 20055100403 in words is "twenty billion, fifty-five million, one hundred thousand, four hundred three".