20212072 has 16 divisors (see below), whose sum is σ = 39204900. Its totient is φ = 9757440.

The previous prime is 20212063. The next prime is 20212079. The reversal of 20212072 is 27021202.

It can be written as a sum of positive squares in 2 ways, for example, as 19412836 + 799236 = 4406^2 + 894^2 .

It is not an unprimeable number, because it can be changed into a prime (20212079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43329 + ... + 43792.

Almost surely, 2^20212072 is an apocalyptic number.

It is an amenable number.

20212072 is a deficient number, since it is larger than the sum of its proper divisors (18992828).

20212072 is a wasteful number, since it uses less digits than its factorization.

20212072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87156 (or 87152 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 16.

The square root of 20212072 is about 4495.7838026311. The cubic root of 20212072 is about 272.3978103488.

Adding to 20212072 its reverse (27021202), we get a palindrome (47233274).

The spelling of 20212072 in words is "twenty million, two hundred twelve thousand, seventy-two".