20475370 has 24 divisors (see below), whose sum is σ = 37409796. Its totient is φ = 8068608.

The previous prime is 20475349. The next prime is 20475373. The reversal of 20475370 is 7357402.

It can be written as a sum of positive squares in 2 ways, for example, as 19616041 + 859329 = 4429^2 + 927^2 .

It is a Smith number, since the sum of its digits (28) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (20475373) 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, 105994 + ... + 106186.

Almost surely, 2^20475370 is an apocalyptic number.

20475370 is a deficient number, since it is larger than the sum of its proper divisors (16934426).

20475370 is a wasteful number, since it uses less digits than its factorization.

20475370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406 (or 303 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 28.

The square root of 20475370 is about 4524.9718231167. The cubic root of 20475370 is about 273.5755322356.

The spelling of 20475370 in words is "twenty million, four hundred seventy-five thousand, three hundred seventy".