20316642 has 16 divisors (see below), whose sum is σ = 40677600. Its totient is φ = 6764832.

The previous prime is 20316641. The next prime is 20316671. The reversal of 20316642 is 24661302.

It is not an unprimeable number, because it can be changed into a prime (20316641) 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, 9198 + ... + 11190.

It is an arithmetic number, because the mean of its divisors is an integer number (2542350).

Almost surely, 2^20316642 is an apocalyptic number.

20316642 is an abundant number, since it is smaller than the sum of its proper divisors (20360958).

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

20316642 is a wasteful number, since it uses less digits than its factorization.

20316642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3697.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 20316642 is about 4507.3985845496. The cubic root of 20316642 is about 272.8667653482.

Adding to 20316642 its reverse (24661302), we get a palindrome (44977944).

The spelling of 20316642 in words is "twenty million, three hundred sixteen thousand, six hundred forty-two".