20432120 has 16 divisors (see below), whose sum is σ = 45972360. Its totient is φ = 8172832.

The previous prime is 20432117. The next prime is 20432123. The reversal of 20432120 is 2123402.

It is an interprime number because it is at equal distance from previous prime (20432117) and next prime (20432123).

It is a junction number, because it is equal to n+sod(n) for n = 20432095 and 20432104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20432123) 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, 255362 + ... + 255441.

Almost surely, 2^20432120 is an apocalyptic number.

20432120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20432120 is an abundant number, since it is smaller than the sum of its proper divisors (25540240).

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

20432120 is a wasteful number, since it uses less digits than its factorization.

20432120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510814 (or 510810 counting only the distinct ones).

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

The square root of 20432120 is about 4520.1902614824. The cubic root of 20432120 is about 273.3827724703.

Adding to 20432120 its reverse (2123402), we get a palindrome (22555522).

The spelling of 20432120 in words is "twenty million, four hundred thirty-two thousand, one hundred twenty".