20154136 has 32 divisors (see below), whose sum is σ = 40392000. Its totient is φ = 9399456.

The previous prime is 20154133. The next prime is 20154137. The reversal of 20154136 is 63145102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20154133) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 9195 + ... + 11173.

It is an arithmetic number, because the mean of its divisors is an integer number (1262250).

Almost surely, 2^20154136 is an apocalyptic number.

It is an amenable number.

20154136 is an abundant number, since it is smaller than the sum of its proper divisors (20237864).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20154136 is a wasteful number, since it uses less digits than its factorization.

20154136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2071 (or 2067 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 20154136 is about 4489.3358083351. The cubic root of 20154136 is about 272.1372937219.

Adding to 20154136 its reverse (63145102), we get a palindrome (83299238).

The spelling of 20154136 in words is "twenty million, one hundred fifty-four thousand, one hundred thirty-six".