20111403 has 8 divisors (see below), whose sum is σ = 28877968. Its totient is φ = 12376224.

The previous prime is 20111393. The next prime is 20111411. The reversal of 20111403 is 30411102.

It is a happy number.

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

It is not a de Polignac number, because 20111403 - 2²¹ = 18014251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20111303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 257800 + ... + 257877.

It is an arithmetic number, because the mean of its divisors is an integer number (3609746).

Almost surely, 2^20111403 is an apocalyptic number.

20111403 is a deficient number, since it is larger than the sum of its proper divisors (8766565).

20111403 is a wasteful number, since it uses less digits than its factorization.

20111403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515693.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 20111403 is about 4484.5738928019. The cubic root of 20111403 is about 271.9448192200.

Adding to 20111403 its reverse (30411102), we get a palindrome (50522505).

The spelling of 20111403 in words is "twenty million, one hundred eleven thousand, four hundred three".