20095440 has 160 divisors (see below), whose sum is σ = 66948096. Its totient is φ = 4976640.

The previous prime is 20095433. The next prime is 20095441. The reversal of 20095440 is 4459002.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 20095440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20095441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 275244 + ... + 275316.

Almost surely, 2^20095440 is an apocalyptic number.

20095440 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 20095440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33474048).

20095440 is an abundant number, since it is smaller than the sum of its proper divisors (46852656).

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

20095440 is a wasteful number, since it uses less digits than its factorization.

20095440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157 (or 151 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 20095440 is about 4482.7937717455. The cubic root of 20095440 is about 271.8728500292.

The spelling of 20095440 in words is "twenty million, ninety-five thousand, four hundred forty".