20020156 has 24 divisors (see below), whose sum is σ = 37859360. Its totient is φ = 9208512.

The previous prime is 20020151. The next prime is 20020157. The reversal of 20020156 is 65102002.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22390 + ... + 23266.

Almost surely, 2^20020156 is an apocalyptic number.

20020156 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

20020156 is a deficient number, since it is larger than the sum of its proper divisors (17839204).

20020156 is a wasteful number, since it uses less digits than its factorization.

20020156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1333 (or 1331 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 20020156 is about 4474.3888968216. The cubic root of 20020156 is about 271.5329173799.

Adding to 20020156 its reverse (65102002), we get a palindrome (85122158).

The spelling of 20020156 in words is "twenty million, twenty thousand, one hundred fifty-six".