20070144 has 108 divisors (see below), whose sum is σ = 59946432. Its totient is φ = 6451200.

The previous prime is 20070143. The next prime is 20070161. The reversal of 20070144 is 44107002.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20070143) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71284 + ... + 71564.

Almost surely, 2^20070144 is an apocalyptic number.

20070144 is a gapful number since it is divisible by the number (24) 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 20070144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29973216).

20070144 is an abundant number, since it is smaller than the sum of its proper divisors (39876288).

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

20070144 is a wasteful number, since it uses less digits than its factorization.

20070144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334 (or 317 counting only the distinct ones).

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

The square root of 20070144 is about 4479.9714284803. The cubic root of 20070144 is about 271.7587249121.

Adding to 20070144 its reverse (44107002), we get a palindrome (64177146).

The spelling of 20070144 in words is "twenty million, seventy thousand, one hundred forty-four".