20072772 has 72 divisors (see below), whose sum is σ = 53385696. Its totient is φ = 6594048.

The previous prime is 20072771. The next prime is 20072777. The reversal of 20072772 is 27727002.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20072771) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 103908 + ... + 104100.

It is an arithmetic number, because the mean of its divisors is an integer number (741468).

Almost surely, 2^20072772 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20072772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26692848).

20072772 is an abundant number, since it is smaller than the sum of its proper divisors (33312924).

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

20072772 is a wasteful number, since it uses less digits than its factorization.

20072772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319 (or 305 counting only the distinct ones).

The product of its (nonzero) digits is 2744, while the sum is 27.

The square root of 20072772 is about 4480.2647243215. The cubic root of 20072772 is about 271.7705858262.

Adding to 20072772 its reverse (27727002), we get a palindrome (47799774).

The spelling of 20072772 in words is "twenty million, seventy-two thousand, seven hundred seventy-two".