20189475 has 36 divisors (see below), whose sum is σ = 36779392. Its totient is φ = 10584000.

The previous prime is 20189471. The next prime is 20189479. The reversal of 20189475 is 57498102.

20189475 is a `hidden beast` number, since 2 + 0 + 189 + 475 = 666.

It is an interprime number because it is at equal distance from previous prime (20189471) and next prime (20189479).

It is not a de Polignac number, because 20189475 - 2² = 20189471 is a prime.

It is a super-2 number, since 2×20189475² = 815229801551250, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20189471) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 12990 + ... + 14460.

Almost surely, 2^20189475 is an apocalyptic number.

20189475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20189475 is a deficient number, since it is larger than the sum of its proper divisors (16589917).

20189475 is a wasteful number, since it uses less digits than its factorization.

20189475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1548 (or 1540 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 20189475 is about 4493.2699674068. The cubic root of 20189475 is about 272.2962593444.

It can be divided in two parts, 201 and 89475, that added together give a triangular number (89676 = T₄₂₃).

The spelling of 20189475 in words is "twenty million, one hundred eighty-nine thousand, four hundred seventy-five".