20212685 has 16 divisors (see below), whose sum is σ = 24729600. Its totient is φ = 15857856.

The previous prime is 20212667. The next prime is 20212691. The reversal of 20212685 is 58621202.

It is a cyclic number.

It is not a de Polignac number, because 20212685 - 2¹⁰ = 20211661 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88151 + ... + 88379.

It is an arithmetic number, because the mean of its divisors is an integer number (1545600).

Almost surely, 2^20212685 is an apocalyptic number.

It is an amenable number.

20212685 is a deficient number, since it is larger than the sum of its proper divisors (4516915).

20212685 is a wasteful number, since it uses less digits than its factorization.

20212685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 20212685 is about 4495.8519771007. The cubic root of 20212685 is about 272.4005641184.

Adding to 20212685 its reverse (58621202), we get a palindrome (78833887).

The spelling of 20212685 in words is "twenty million, two hundred twelve thousand, six hundred eighty-five".