20872435 has 8 divisors (see below), whose sum is σ = 25290720. Its totient is φ = 16535424.

The previous prime is 20872433. The next prime is 20872457. The reversal of 20872435 is 53427802.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20872435 - 2¹ = 20872433 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20872397 and 20872406.

It is not an unprimeable number, because it can be changed into a prime (20872433) 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, 19750 + ... + 20779.

It is an arithmetic number, because the mean of its divisors is an integer number (3161340).

Almost surely, 2^20872435 is an apocalyptic number.

20872435 is a deficient number, since it is larger than the sum of its proper divisors (4418285).

20872435 is a wasteful number, since it uses less digits than its factorization.

20872435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40637.

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 20872435 is about 4568.6360108899. The cubic root of 20872435 is about 275.3326442980.

The spelling of 20872435 in words is "twenty million, eight hundred seventy-two thousand, four hundred thirty-five".