20242403 has 4 divisors (see below), whose sum is σ = 20401920. Its totient is φ = 20082888.

The previous prime is 20242373. The next prime is 20242433. The reversal of 20242403 is 30424202.

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 (20242373) and next prime (20242433).

It is a cyclic number.

It is not a de Polignac number, because 20242403 - 2¹² = 20238307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20242433) 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, 79568 + ... + 79821.

It is an arithmetic number, because the mean of its divisors is an integer number (5100480).

Almost surely, 2^20242403 is an apocalyptic number.

20242403 is a deficient number, since it is larger than the sum of its proper divisors (159517).

20242403 is a wasteful number, since it uses less digits than its factorization.

20242403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159516.

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 20242403 is about 4499.1558097047. The cubic root of 20242403 is about 272.5339990685.

Adding to 20242403 its reverse (30424202), we get a palindrome (50666605).

The spelling of 20242403 in words is "twenty million, two hundred forty-two thousand, four hundred three".