20143854 has 24 divisors (see below), whose sum is σ = 44049720. Its totient is φ = 6652368.

The previous prime is 20143843. The next prime is 20143859. The reversal of 20143854 is 45834102.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20143859) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3172 + ... + 7095.

It is an arithmetic number, because the mean of its divisors is an integer number (1835405).

Almost surely, 2^20143854 is an apocalyptic number.

20143854 is an abundant number, since it is smaller than the sum of its proper divisors (23905866).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20143854 is a wasteful number, since it uses less digits than its factorization.

20143854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10384 (or 10381 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 20143854 is about 4488.1905039782. The cubic root of 20143854 is about 272.0910072487.

Adding to 20143854 its reverse (45834102), we get a palindrome (65977956).

The spelling of 20143854 in words is "twenty million, one hundred forty-three thousand, eight hundred fifty-four".