20080156 has 12 divisors (see below), whose sum is σ = 35227080. Its totient is φ = 10015280.

The previous prime is 20080153. The next prime is 20080171. The reversal of 20080156 is 65108002.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20080153) 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, 4315 + ... + 7666.

It is an arithmetic number, because the mean of its divisors is an integer number (2935590).

Almost surely, 2^20080156 is an apocalyptic number.

It is an amenable number.

20080156 is a deficient number, since it is larger than the sum of its proper divisors (15146924).

20080156 is a wasteful number, since it uses less digits than its factorization.

20080156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12404 (or 12402 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 20080156 is about 4481.0887069997. The cubic root of 20080156 is about 271.8039063858.

Adding to 20080156 its reverse (65108002), we get a palindrome (85188158).

The spelling of 20080156 in words is "twenty million, eighty thousand, one hundred fifty-six".