20414540 has 24 divisors (see below), whose sum is σ = 43681680. Its totient is φ = 8011328.

The previous prime is 20414539. The next prime is 20414543. The reversal of 20414540 is 4541402.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (20414543) 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, 8570 + ... + 10689.

It is an arithmetic number, because the mean of its divisors is an integer number (1820070).

Almost surely, 2^20414540 is an apocalyptic number.

20414540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20414540 is an abundant number, since it is smaller than the sum of its proper divisors (23267140).

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

20414540 is a wasteful number, since it uses less digits than its factorization.

20414540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19321 (or 19319 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 20414540 is about 4518.2452346016. The cubic root of 20414540 is about 273.3043428834.

Adding to 20414540 its reverse (4541402), we get a palindrome (24955942).

The spelling of 20414540 in words is "twenty million, four hundred fourteen thousand, five hundred forty".