20433480 has 32 divisors (see below), whose sum is σ = 61300800. Its totient is φ = 5448896.

The previous prime is 20433463. The next prime is 20433481. The reversal of 20433480 is 8433402.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 20433480.

It is not an unprimeable number, because it can be changed into a prime (20433481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85020 + ... + 85259.

It is an arithmetic number, because the mean of its divisors is an integer number (1915650).

Almost surely, 2^20433480 is an apocalyptic number.

20433480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20433480 is an abundant number, since it is smaller than the sum of its proper divisors (40867320).

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

20433480 is a wasteful number, since it uses less digits than its factorization.

20433480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170293 (or 170289 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 20433480 is about 4520.3406951246. The cubic root of 20433480 is about 273.3888379581.

Adding to 20433480 its reverse (8433402), we get a palindrome (28866882).

The spelling of 20433480 in words is "twenty million, four hundred thirty-three thousand, four hundred eighty".