20712072 has 16 divisors (see below), whose sum is σ = 51780240. Its totient is φ = 6904016.

The previous prime is 20712067. The next prime is 20712077. The reversal of 20712072 is 27021702.

It is an interprime number because it is at equal distance from previous prime (20712067) and next prime (20712077).

It is not an unprimeable number, because it can be changed into a prime (20712077) 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, 431478 + ... + 431525.

It is an arithmetic number, because the mean of its divisors is an integer number (3236265).

Almost surely, 2^20712072 is an apocalyptic number.

It is an amenable number.

20712072 is an abundant number, since it is smaller than the sum of its proper divisors (31068168).

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

20712072 is a wasteful number, since it uses less digits than its factorization.

20712072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 863012 (or 863008 counting only the distinct ones).

The product of its (nonzero) digits is 392, while the sum is 21.

The square root of 20712072 is about 4551.0517465746. The cubic root of 20712072 is about 274.6257034564.

Adding to 20712072 its reverse (27021702), we get a palindrome (47733774).

It can be divided in two parts, 2071207 and 2, that multiplied together give a palindrome (4142414).

The spelling of 20712072 in words is "twenty million, seven hundred twelve thousand, seventy-two".