20475336 has 96 divisors (see below), whose sum is σ = 62216640. Its totient is φ = 5588352.

The previous prime is 20475311. The next prime is 20475337. The reversal of 20475336 is 63357402.

It is not an unprimeable number, because it can be changed into a prime (20475337) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26670 + ... + 27426.

It is an arithmetic number, because the mean of its divisors is an integer number (648090).

Almost surely, 2^20475336 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20475336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31108320).

20475336 is an abundant number, since it is smaller than the sum of its proper divisors (41741304).

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

20475336 is a wasteful number, since it uses less digits than its factorization.

20475336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 803 (or 792 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 30.

The square root of 20475336 is about 4524.9680661857. The cubic root of 20475336 is about 273.5753808086.

The spelling of 20475336 in words is "twenty million, four hundred seventy-five thousand, three hundred thirty-six".