20872606 has 16 divisors (see below), whose sum is σ = 32145984. Its totient is φ = 10159744.

The previous prime is 20872603. The next prime is 20872613. The reversal of 20872606 is 60627802.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20872601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21426 + ... + 22378.

It is an arithmetic number, because the mean of its divisors is an integer number (2009124).

Almost surely, 2^20872606 is an apocalyptic number.

20872606 is a deficient number, since it is larger than the sum of its proper divisors (11273378).

20872606 is a wasteful number, since it uses less digits than its factorization.

20872606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1235.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 20872606 is about 4568.6547254088. The cubic root of 20872606 is about 275.3333961948. Note that the first 4 decimals are identical.

The spelling of 20872606 in words is "twenty million, eight hundred seventy-two thousand, six hundred six".