20870632 has 24 divisors (see below), whose sum is σ = 40016610. Its totient is φ = 10204640.

The previous prime is 20870623. The next prime is 20870639. The reversal of 20870632 is 23607802.

It can be written as a sum of positive squares in only one way, i.e., 13439556 + 7431076 = 3666^2 + 2726^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20870632.

It is not an unprimeable number, because it can be changed into a prime (20870639) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17082 + ... + 18262.

Almost surely, 2^20870632 is an apocalyptic number.

It is an amenable number.

20870632 is a deficient number, since it is larger than the sum of its proper divisors (19145978).

20870632 is a wasteful number, since it uses less digits than its factorization.

20870632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1281 (or 1230 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 20870632 is about 4568.4386829638. The cubic root of 20870632 is about 275.3247161533.

The spelling of 20870632 in words is "twenty million, eight hundred seventy thousand, six hundred thirty-two".