20132420 has 96 divisors (see below), whose sum is σ = 55883520. Its totient is φ = 5898240.

The previous prime is 20132407. The next prime is 20132443. The reversal of 20132420 is 2423102.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 20132395 and 20132404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25796 + ... + 26564.

It is an arithmetic number, because the mean of its divisors is an integer number (582120).

Almost surely, 2^20132420 is an apocalyptic number.

20132420 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 20132420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27941760).

20132420 is an abundant number, since it is smaller than the sum of its proper divisors (35751100).

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

20132420 is a wasteful number, since it uses less digits than its factorization.

20132420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 813 (or 811 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 20132420 is about 4486.9165358852. The cubic root of 20132420 is about 272.0395163176.

Adding to 20132420 its reverse (2423102), we get a palindrome (22555522).

The spelling of 20132420 in words is "twenty million, one hundred thirty-two thousand, four hundred twenty".