20144835 has 48 divisors (see below), whose sum is σ = 37144800. Its totient is φ = 10357632.

The previous prime is 20144833. The next prime is 20144837. The reversal of 20144835 is 53844102.

It is an interprime number because it is at equal distance from previous prime (20144833) and next prime (20144837).

It is not a de Polignac number, because 20144835 - 2¹ = 20144833 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 20144799 and 20144808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20144833) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 184761 + ... + 184869.

It is an arithmetic number, because the mean of its divisors is an integer number (773850).

Almost surely, 2^20144835 is an apocalyptic number.

20144835 is a deficient number, since it is larger than the sum of its proper divisors (16999965).

20144835 is a wasteful number, since it uses less digits than its factorization.

20144835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197 (or 154 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 20144835 is about 4488.2997894526. The cubic root of 20144835 is about 272.0954240954.

Adding to 20144835 its reverse (53844102), we get a palindrome (73988937).

The spelling of 20144835 in words is "twenty million, one hundred forty-four thousand, eight hundred thirty-five".