20140420 has 12 divisors (see below), whose sum is σ = 42294924. Its totient is φ = 8056160.

The previous prime is 20140411. The next prime is 20140423. The reversal of 20140420 is 2404102.

It can be written as a sum of positive squares in 2 ways, for example, as 13075456 + 7064964 = 3616^2 + 2658^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20140420.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20140423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 503491 + ... + 503530.

It is an arithmetic number, because the mean of its divisors is an integer number (3524577).

Almost surely, 2^20140420 is an apocalyptic number.

20140420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20140420 is an abundant number, since it is smaller than the sum of its proper divisors (22154504).

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

20140420 is a wasteful number, since it uses less digits than its factorization.

20140420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1007030 (or 1007028 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 20140420 is about 4487.8079281538. The cubic root of 20140420 is about 272.0755449044.

Adding to 20140420 its reverse (2404102), we get a palindrome (22544522).

The spelling of 20140420 in words is "twenty million, one hundred forty thousand, four hundred twenty".