20103455 has 4 divisors (see below), whose sum is σ = 24124152. Its totient is φ = 16082760.

The previous prime is 20103443. The next prime is 20103487. The reversal of 20103455 is 55430102.

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

It is not a de Polignac number, because 20103455 - 2⁸ = 20103199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2010341 + ... + 2010350.

It is an arithmetic number, because the mean of its divisors is an integer number (6031038).

Almost surely, 2^20103455 is an apocalyptic number.

20103455 is a deficient number, since it is larger than the sum of its proper divisors (4020697).

20103455 is an equidigital number, since it uses as much as digits as its factorization.

20103455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4020696.

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

The square root of 20103455 is about 4483.6876563829. The cubic root of 20103455 is about 271.9089904215.

Adding to 20103455 its reverse (55430102), we get a palindrome (75533557).

The spelling of 20103455 in words is "twenty million, one hundred three thousand, four hundred fifty-five".