20854137 has 4 divisors (see below), whose sum is σ = 27805520. Its totient is φ = 13902756.

The previous prime is 20854111. The next prime is 20854139. The reversal of 20854137 is 73145802.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 20854137 - 2⁶ = 20854073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20854139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3475687 + ... + 3475692.

It is an arithmetic number, because the mean of its divisors is an integer number (6951380).

Almost surely, 2^20854137 is an apocalyptic number.

It is an amenable number.

20854137 is a deficient number, since it is larger than the sum of its proper divisors (6951383).

20854137 is an equidigital number, since it uses as much as digits as its factorization.

20854137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6951382.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 20854137 is about 4566.6330047421. The cubic root of 20854137 is about 275.2521631969.

Adding to 20854137 its reverse (73145802), we get a palindrome (93999939).

It can be divided in two parts, 208 and 54137, that added together give a palindrome (54345).

The spelling of 20854137 in words is "twenty million, eight hundred fifty-four thousand, one hundred thirty-seven".