20368040 has 128 divisors (see below), whose sum is σ = 60652800. Its totient is φ = 5959680.

The previous prime is 20368037. The next prime is 20368043. The reversal of 20368040 is 4086302.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20368037) and next prime (20368043).

It is a junction number, because it is equal to n+sod(n) for n = 20367997 and 20368015.

It is not an unprimeable number, because it can be changed into a prime (20368043) 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, 52166 + ... + 52554.

It is an arithmetic number, because the mean of its divisors is an integer number (473850).

Almost surely, 2^20368040 is an apocalyptic number.

20368040 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 20368040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30326400).

20368040 is an abundant number, since it is smaller than the sum of its proper divisors (40284760).

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

20368040 is a wasteful number, since it uses less digits than its factorization.

20368040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435 (or 431 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 20368040 is about 4513.0964979712. The cubic root of 20368040 is about 273.0966753193.

The spelling of 20368040 in words is "twenty million, three hundred sixty-eight thousand, forty".