20365772 has 36 divisors (see below), whose sum is σ = 42900480. Its totient is φ = 8424864.

The previous prime is 20365771. The next prime is 20365783. The reversal of 20365772 is 27756302.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20365771) 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, 3893 + ... + 7475.

It is an arithmetic number, because the mean of its divisors is an integer number (1191680).

Almost surely, 2^20365772 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 20365772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21450240).

20365772 is an abundant number, since it is smaller than the sum of its proper divisors (22534708).

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

20365772 is a wasteful number, since it uses less digits than its factorization.

20365772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3630 (or 3621 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 32.

The square root of 20365772 is about 4512.8452222517. The cubic root of 20365772 is about 273.0865384210.

It can be divided in two parts, 203 and 65772, that multiplied together give a square (13351716 = 3654²).

The spelling of 20365772 in words is "twenty million, three hundred sixty-five thousand, seven hundred seventy-two".