20445012 has 36 divisors (see below), whose sum is σ = 59064096. Its totient is φ = 5841360.

The previous prime is 20445001. The next prime is 20445013. The reversal of 20445012 is 21054402.

20445012 is a `hidden beast` number, since 204 + 450 + 12 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20445013) 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, 40314 + ... + 40817.

Almost surely, 2^20445012 is an apocalyptic number.

It is an amenable number.

20445012 is an abundant number, since it is smaller than the sum of its proper divisors (38619084).

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

20445012 is a wasteful number, since it uses less digits than its factorization.

20445012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81148 (or 81143 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 20445012 is about 4521.6160827739. The cubic root of 20445012 is about 273.4402589131.

Adding to 20445012 its reverse (21054402), we get a palindrome (41499414).

It can be divided in two parts, 2044 and 5012, that added together give a square (7056 = 84²).

The spelling of 20445012 in words is "twenty million, four hundred forty-five thousand, twelve".