20474146 has 16 divisors (see below), whose sum is σ = 38289600. Its totient is φ = 7976880.

The previous prime is 20474143. The next prime is 20474161. The reversal of 20474146 is 64147402.

It is not an unprimeable number, because it can be changed into a prime (20474143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66321 + ... + 66628.

It is an arithmetic number, because the mean of its divisors is an integer number (2393100).

Almost surely, 2^20474146 is an apocalyptic number.

20474146 is a deficient number, since it is larger than the sum of its proper divisors (17815454).

20474146 is a wasteful number, since it uses less digits than its factorization.

20474146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132969.

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 20474146 is about 4524.8365716344. The cubic root of 20474146 is about 273.5700807570.

The spelling of 20474146 in words is "twenty million, four hundred seventy-four thousand, one hundred forty-six".