20152403 has 4 divisors (see below), whose sum is σ = 20239128. Its totient is φ = 20065680.

The previous prime is 20152397. The next prime is 20152409. The reversal of 20152403 is 30425102.

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 (20152397) and next prime (20152409).

It is a cyclic number.

It is not a de Polignac number, because 20152403 - 2¹⁰ = 20151379 is a prime.

It is a super-2 number, since 2×20152403² = 812238693348818, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20152409) 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, 43013 + ... + 43478.

It is an arithmetic number, because the mean of its divisors is an integer number (5059782).

Almost surely, 2^20152403 is an apocalyptic number.

20152403 is a deficient number, since it is larger than the sum of its proper divisors (86725).

20152403 is an equidigital number, since it uses as much as digits as its factorization.

20152403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86724.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 20152403 is about 4489.1427912242. The cubic root of 20152403 is about 272.1294933801.

Adding to 20152403 its reverse (30425102), we get a palindrome (50577505).

The spelling of 20152403 in words is "twenty million, one hundred fifty-two thousand, four hundred three".