20120072 has 32 divisors (see below), whose sum is σ = 43934400. Its totient is φ = 8458944.

The previous prime is 20120071. The next prime is 20120081. The reversal of 20120072 is 27002102.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is not an unprimeable number, because it can be changed into a prime (20120071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 422 + ... + 6357.

It is an arithmetic number, because the mean of its divisors is an integer number (1372950).

Almost surely, 2^20120072 is an apocalyptic number.

It is an amenable number.

20120072 is an abundant number, since it is smaller than the sum of its proper divisors (23814328).

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

20120072 is a wasteful number, since it uses less digits than its factorization.

20120072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6845 (or 6841 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 14.

The square root of 20120072 is about 4485.5403241973. The cubic root of 20120072 is about 271.9838874539.

Adding to 20120072 its reverse (27002102), we get a palindrome (47122174).

The spelling of 20120072 in words is "twenty million, one hundred twenty thousand, seventy-two".