20032420 has 12 divisors (see below), whose sum is σ = 42068124. Its totient is φ = 8012960.

The previous prime is 20032399. The next prime is 20032423. The reversal of 20032420 is 2423002.

It can be written as a sum of positive squares in 2 ways, for example, as 3041536 + 16990884 = 1744^2 + 4122^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20032420.

It is not an unprimeable number, because it can be changed into a prime (20032423) 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, 500791 + ... + 500830.

It is an arithmetic number, because the mean of its divisors is an integer number (3505677).

Almost surely, 2^20032420 is an apocalyptic number.

20032420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20032420 is an abundant number, since it is smaller than the sum of its proper divisors (22035704).

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

20032420 is a wasteful number, since it uses less digits than its factorization.

20032420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1001630 (or 1001628 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 13.

The square root of 20032420 is about 4475.7591534845. The cubic root of 20032420 is about 271.5883515125.

Adding to 20032420 its reverse (2423002), we get a palindrome (22455422).

The spelling of 20032420 in words is "twenty million, thirty-two thousand, four hundred twenty".