20470188 has 12 divisors (see below), whose sum is σ = 47763800. Its totient is φ = 6823392.

The previous prime is 20470187. The next prime is 20470189. The reversal of 20470188 is 88107402.

It is an interprime number because it is at equal distance from previous prime (20470187) and next prime (20470189).

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (20470181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 852913 + ... + 852936.

Almost surely, 2^20470188 is an apocalyptic number.

It is an amenable number.

20470188 is an abundant number, since it is smaller than the sum of its proper divisors (27293612).

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

20470188 is a wasteful number, since it uses less digits than its factorization.

20470188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1705856 (or 1705854 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 20470188 is about 4524.3991866324. The cubic root of 20470188 is about 273.5524510407.

The spelling of 20470188 in words is "twenty million, four hundred seventy thousand, one hundred eighty-eight".