20272392 has 192 divisors, whose sum is σ = 69264000. Its totient is φ = 5225472.

The previous prime is 20272379. The next prime is 20272397. The reversal of 20272392 is 29327202.

20272392 is a `hidden beast` number, since 2 + 0 + 272 + 392 = 666.

It is not an unprimeable number, because it can be changed into a prime (20272397) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 277668 + ... + 277740.

It is an arithmetic number, because the mean of its divisors is an integer number (360750).

Almost surely, 2^20272392 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 20272392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34632000).

20272392 is an abundant number, since it is smaller than the sum of its proper divisors (48991608).

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

20272392 is a wasteful number, since it uses less digits than its factorization.

20272392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140 (or 133 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 20272392 is about 4502.4873125862. The cubic root of 20272392 is about 272.6685184949.

Adding to 20272392 its reverse (29327202), we get a palindrome (49599594).

The spelling of 20272392 in words is "twenty million, two hundred seventy-two thousand, three hundred ninety-two".