20602156 has 24 divisors (see below), whose sum is σ = 38118080. Its totient is φ = 9716112.

The previous prime is 20602123. The next prime is 20602157. The reversal of 20602156 is 65120602.

It is not an unprimeable number, because it can be changed into a prime (20602157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22891 + ... + 23773.

Almost surely, 2^20602156 is an apocalyptic number.

It is an amenable number.

20602156 is a deficient number, since it is larger than the sum of its proper divisors (17515924).

20602156 is a wasteful number, since it uses less digits than its factorization.

20602156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1213 (or 1211 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 20602156 is about 4538.9597927278. The cubic root of 20602156 is about 274.1390417972.

Adding to 20602156 its reverse (65120602), we get a palindrome (85722758).

It can be divided in two parts, 20 and 602156, that added together give a square (602176 = 776²).

The spelling of 20602156 in words is "twenty million, six hundred two thousand, one hundred fifty-six".