20842535 has 16 divisors (see below), whose sum is σ = 28773696. Its totient is φ = 14197248.

The previous prime is 20842529. The next prime is 20842543. The reversal of 20842535 is 53524802.

It is a cyclic number.

It is not a de Polignac number, because 20842535 - 2⁴ = 20842519 is a prime.

It is a super-2 number, since 2×20842535² = 868822530452450, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20842498 and 20842507.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3599 + ... + 7391.

It is an arithmetic number, because the mean of its divisors is an integer number (1798356).

Almost surely, 2^20842535 is an apocalyptic number.

20842535 is a deficient number, since it is larger than the sum of its proper divisors (7931161).

20842535 is a wasteful number, since it uses less digits than its factorization.

20842535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3962.

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 20842535 is about 4565.3625266785. The cubic root of 20842535 is about 275.2011090903.

The spelling of 20842535 in words is "twenty million, eight hundred forty-two thousand, five hundred thirty-five".