20853237 has 32 divisors (see below), whose sum is σ = 31059072. Its totient is φ = 12386304.

The previous prime is 20853229. The next prime is 20853257. The reversal of 20853237 is 73235802.

It is not a de Polignac number, because 20853237 - 2³ = 20853229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20853227) 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, 81013 + ... + 81269.

It is an arithmetic number, because the mean of its divisors is an integer number (970596).

Almost surely, 2^20853237 is an apocalyptic number.

It is an amenable number.

20853237 is a deficient number, since it is larger than the sum of its proper divisors (10205835).

20853237 is a wasteful number, since it uses less digits than its factorization.

20853237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357.

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 20853237 is about 4566.5344628066. The cubic root of 20853237 is about 275.2482034628.

The spelling of 20853237 in words is "twenty million, eight hundred fifty-three thousand, two hundred thirty-seven".