20143146 has 16 divisors (see below), whose sum is σ = 40446144. Its totient is φ = 6687744.

The previous prime is 20143129. The next prime is 20143153. The reversal of 20143146 is 64134102.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4990 + ... + 8073.

It is an arithmetic number, because the mean of its divisors is an integer number (2527884).

Almost surely, 2^20143146 is an apocalyptic number.

20143146 is an abundant number, since it is smaller than the sum of its proper divisors (20302998).

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

20143146 is a wasteful number, since it uses less digits than its factorization.

20143146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13325.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 20143146 is about 4488.1116296278. Note that the first 3 decimals coincide. The cubic root of 20143146 is about 272.0878194660.

Adding to 20143146 its reverse (64134102), we get a palindrome (84277248).

The spelling of 20143146 in words is "twenty million, one hundred forty-three thousand, one hundred forty-six".