20201870 has 16 divisors (see below), whose sum is σ = 39160800. Its totient is φ = 7459104.

The previous prime is 20201849. The next prime is 20201891. The reversal of 20201870 is 7810202.

It is an interprime number because it is at equal distance from previous prime (20201849) and next prime (20201891).

It is a congruent number.

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, 77570 + ... + 77829.

It is an arithmetic number, because the mean of its divisors is an integer number (2447550).

Almost surely, 2^20201870 is an apocalyptic number.

20201870 is a deficient number, since it is larger than the sum of its proper divisors (18958930).

20201870 is a wasteful number, since it uses less digits than its factorization.

20201870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155419.

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 20201870 is about 4494.6490408040. The cubic root of 20201870 is about 272.3519718988.

The spelling of 20201870 in words is "twenty million, two hundred one thousand, eight hundred seventy".