20452403 has 4 divisors (see below), whose sum is σ = 20558568. Its totient is φ = 20346240.

The previous prime is 20452363. The next prime is 20452427. The reversal of 20452403 is 30425402.

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

It is a cyclic number.

It is not a de Polignac number, because 20452403 - 2⁸ = 20452147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20452463) 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, 52793 + ... + 53178.

It is an arithmetic number, because the mean of its divisors is an integer number (5139642).

Almost surely, 2^20452403 is an apocalyptic number.

20452403 is a deficient number, since it is larger than the sum of its proper divisors (106165).

20452403 is a wasteful number, since it uses less digits than its factorization.

20452403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106164.

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 20452403 is about 4522.4333052020. The cubic root of 20452403 is about 273.4732050659.

Adding to 20452403 its reverse (30425402), we get a palindrome (50877805).

The spelling of 20452403 in words is "twenty million, four hundred fifty-two thousand, four hundred three".