20144040 has 64 divisors (see below), whose sum is σ = 69068160. Its totient is φ = 4604160.

The previous prime is 20144039. The next prime is 20144051. The reversal of 20144040 is 4044102.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11151 + ... + 12830.

It is an arithmetic number, because the mean of its divisors is an integer number (1079190).

Almost surely, 2^20144040 is an apocalyptic number.

20144040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20144040 is an abundant number, since it is smaller than the sum of its proper divisors (48924120).

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

20144040 is a wasteful number, since it uses less digits than its factorization.

20144040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24002 (or 23998 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 20144040 is about 4488.2112249759. The cubic root of 20144040 is about 272.0918447047.

Adding to 20144040 its reverse (4044102), we get a palindrome (24188142).

The spelling of 20144040 in words is "twenty million, one hundred forty-four thousand, forty".