20143418 has 8 divisors (see below), whose sum is σ = 30492660. Its totient is φ = 9979200.

The previous prime is 20143411. The next prime is 20143421. The reversal of 20143418 is 81434102.

It can be written as a sum of positive squares in 2 ways, for example, as 18003049 + 2140369 = 4243^2 + 1463^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 20143393 and 20143402.

It is not an unprimeable number, because it can be changed into a prime (20143411) 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, 45983 + ... + 46418.

Almost surely, 2^20143418 is an apocalyptic number.

20143418 is a deficient number, since it is larger than the sum of its proper divisors (10349242).

20143418 is a wasteful number, since it uses less digits than its factorization.

20143418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92512.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 20143418 is about 4488.1419318021. The cubic root of 20143418 is about 272.0890441597.

The spelling of 20143418 in words is "twenty million, one hundred forty-three thousand, four hundred eighteen".