20142403 has 4 divisors (see below), whose sum is σ = 20157568. Its totient is φ = 20127240.

The previous prime is 20142401. The next prime is 20142427. The reversal of 20142403 is 30424102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30424102 = 2 ⋅15212051.

It is a cyclic number.

It is not a de Polignac number, because 20142403 - 2¹ = 20142401 is a prime.

It is a super-2 number, since 2×20142403² = 811432797228818, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20142401) 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, 5376 + ... + 8317.

It is an arithmetic number, because the mean of its divisors is an integer number (5039392).

Almost surely, 2^20142403 is an apocalyptic number.

20142403 is a deficient number, since it is larger than the sum of its proper divisors (15165).

20142403 is a wasteful number, since it uses less digits than its factorization.

20142403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15164.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 20142403 is about 4488.0288546310. The cubic root of 20142403 is about 272.0844740148.

Adding to 20142403 its reverse (30424102), we get a palindrome (50566505).

The spelling of 20142403 in words is "twenty million, one hundred forty-two thousand, four hundred three".