20413242 has 16 divisors (see below), whose sum is σ = 45362880. Its totient is φ = 6804396.

The previous prime is 20413231. The next prime is 20413247. The reversal of 20413242 is 24231402.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (20413247) 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, 188958 + ... + 189065.

It is an arithmetic number, because the mean of its divisors is an integer number (2835180).

Almost surely, 2^20413242 is an apocalyptic number.

20413242 is an abundant number, since it is smaller than the sum of its proper divisors (24949638).

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

20413242 is a wasteful number, since it uses less digits than its factorization.

20413242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378034 (or 378028 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 20413242 is about 4518.1015924833. The cubic root of 20413242 is about 273.2985503363.

Adding to 20413242 its reverse (24231402), we get a palindrome (44644644).

The spelling of 20413242 in words is "twenty million, four hundred thirteen thousand, two hundred forty-two".