20133420 has 24 divisors (see below), whose sum is σ = 56373744. Its totient is φ = 5368896.

The previous prime is 20133413. The next prime is 20133431. The reversal of 20133420 is 2433102.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20133420.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 167719 + ... + 167838.

It is an arithmetic number, because the mean of its divisors is an integer number (2348906).

Almost surely, 2^20133420 is an apocalyptic number.

20133420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20133420 is an abundant number, since it is smaller than the sum of its proper divisors (36240324).

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

20133420 is a wasteful number, since it uses less digits than its factorization.

20133420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335569 (or 335567 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 20133420 is about 4487.0279696030. The cubic root of 20133420 is about 272.0440204128.

Adding to 20133420 its reverse (2433102), we get a palindrome (22566522).

The spelling of 20133420 in words is "twenty million, one hundred thirty-three thousand, four hundred twenty".