20145371 has 8 divisors (see below), whose sum is σ = 20680704. Its totient is φ = 19613160.

The previous prime is 20145361. The next prime is 20145397. The reversal of 20145371 is 17354102.

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

It is not a de Polignac number, because 20145371 - 2¹⁰ = 20144347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20145341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17990 + ... + 19076.

It is an arithmetic number, because the mean of its divisors is an integer number (2585088).

Almost surely, 2^20145371 is an apocalyptic number.

20145371 is a deficient number, since it is larger than the sum of its proper divisors (535333).

20145371 is a wasteful number, since it uses less digits than its factorization.

20145371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1561.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 20145371 is about 4488.3594998618. The cubic root of 20145371 is about 272.0978373171.

Adding to 20145371 its reverse (17354102), we get a palindrome (37499473).

The spelling of 20145371 in words is "twenty million, one hundred forty-five thousand, three hundred seventy-one".