20144700 has 108 divisors (see below), whose sum is σ = 65560040. Its totient is φ = 5365440.

The previous prime is 20144671. The next prime is 20144737. The reversal of 20144700 is 744102.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (108).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 23886 + ... + 24714.

Almost surely, 2^20144700 is an apocalyptic number.

20144700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20144700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32780020).

20144700 is an abundant number, since it is smaller than the sum of its proper divisors (45415340).

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

20144700 is a wasteful number, since it uses less digits than its factorization.

20144700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 858 (or 839 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 20144700 is about 4488.2847503250. The cubic root of 20144700 is about 272.0948162810.

Adding to 20144700 its reverse (744102), we get a palindrome (20888802).

The spelling of 20144700 in words is "twenty million, one hundred forty-four thousand, seven hundred".