20145708 has 36 divisors (see below), whose sum is σ = 55554408. Its totient is φ = 6104640.

The previous prime is 20145701. The next prime is 20145709. The reversal of 20145708 is 80754102.

20145708 is a `hidden beast` number, since 201 + 457 + 0 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (20145701) 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, 25041 + ... + 25832.

It is an arithmetic number, because the mean of its divisors is an integer number (1543178).

Almost surely, 2^20145708 is an apocalyptic number.

It is an amenable number.

20145708 is an abundant number, since it is smaller than the sum of its proper divisors (35408700).

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

20145708 is a wasteful number, since it uses less digits than its factorization.

20145708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50894 (or 50889 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 20145708 is about 4488.3970412609. The cubic root of 20145708 is about 272.0993545632.

The spelling of 20145708 in words is "twenty million, one hundred forty-five thousand, seven hundred eight".