20145210 has 32 divisors (see below), whose sum is σ = 48650112. Its totient is φ = 5338560.

The previous prime is 20145193. The next prime is 20145233. The reversal of 20145210 is 1254102.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20145210.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3000 + ... + 7020.

It is an arithmetic number, because the mean of its divisors is an integer number (1520316).

Almost surely, 2^20145210 is an apocalyptic number.

20145210 is an abundant number, since it is smaller than the sum of its proper divisors (28504902).

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

20145210 is a wasteful number, since it uses less digits than its factorization.

20145210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4198.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 20145210 is about 4488.3415645425. The cubic root of 20145210 is about 272.0971124546.

Adding to 20145210 its reverse (1254102), we get a palindrome (21399312).

The spelling of 20145210 in words is "twenty million, one hundred forty-five thousand, two hundred ten".