20475012 has 12 divisors (see below), whose sum is σ = 47775056. Its totient is φ = 6825000.

The previous prime is 20475001. The next prime is 20475019. The reversal of 20475012 is 21057402.

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

It is a super-2 number, since 2×20475012² = 838452232800288, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20475012.

It is not an unprimeable number, because it can be changed into a prime (20475019) 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, 853114 + ... + 853137.

Almost surely, 2^20475012 is an apocalyptic number.

It is an amenable number.

20475012 is an abundant number, since it is smaller than the sum of its proper divisors (27300044).

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

20475012 is a wasteful number, since it uses less digits than its factorization.

20475012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1706258 (or 1706256 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 20475012 is about 4524.9322646864. The cubic root of 20475012 is about 273.5739377897.

The spelling of 20475012 in words is "twenty million, four hundred seventy-five thousand, twelve".