20595040 has 48 divisors (see below), whose sum is σ = 49194432. Its totient is φ = 8146944.

The previous prime is 20595037. The next prime is 20595049. The reversal of 20595040 is 4059502.

It is a junction number, because it is equal to n+sod(n) for n = 20594996 and 20595014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20595049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14857 + ... + 16183.

It is an arithmetic number, because the mean of its divisors is an integer number (1024884).

Almost surely, 2^20595040 is an apocalyptic number.

20595040 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 20595040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24597216).

20595040 is an abundant number, since it is smaller than the sum of its proper divisors (28599392).

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

20595040 is a wasteful number, since it uses less digits than its factorization.

20595040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1439 (or 1431 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 20595040 is about 4538.1758449844. The cubic root of 20595040 is about 274.1074755530.

The spelling of 20595040 in words is "twenty million, five hundred ninety-five thousand, forty".