20272156 has 12 divisors (see below), whose sum is σ = 35518392. Its totient is φ = 10124048.

The previous prime is 20272117. The next prime is 20272157. The reversal of 20272156 is 65127202.

It is a self number, because there is not a number n which added to its sum of digits gives 20272156.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20272157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1551 + ... + 6553.

It is an arithmetic number, because the mean of its divisors is an integer number (2959866).

Almost surely, 2^20272156 is an apocalyptic number.

It is an amenable number.

20272156 is a deficient number, since it is larger than the sum of its proper divisors (15246236).

20272156 is a wasteful number, since it uses less digits than its factorization.

20272156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6020 (or 6018 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 20272156 is about 4502.4611047737. The cubic root of 20272156 is about 272.6674604053.

Adding to 20272156 its reverse (65127202), we get a palindrome (85399358).

The spelling of 20272156 in words is "twenty million, two hundred seventy-two thousand, one hundred fifty-six".