20873535 has 32 divisors (see below), whose sum is σ = 36910080. Its totient is φ = 10019328.

The previous prime is 20873519. The next prime is 20873537. The reversal of 20873535 is 53537802.

It is not a de Polignac number, because 20873535 - 2⁴ = 20873519 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20873496 and 20873505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20873537) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4086 + ... + 7644.

It is an arithmetic number, because the mean of its divisors is an integer number (1153440).

Almost surely, 2^20873535 is an apocalyptic number.

20873535 is a deficient number, since it is larger than the sum of its proper divisors (16036545).

20873535 is a wasteful number, since it uses less digits than its factorization.

20873535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3607.

The product of its (nonzero) digits is 25200, while the sum is 33.

The square root of 20873535 is about 4568.7563953444. The cubic root of 20873535 is about 275.3374809895.

The spelling of 20873535 in words is "twenty million, eight hundred seventy-three thousand, five hundred thirty-five".