20312642 has 8 divisors (see below), whose sum is σ = 34821696. Its totient is φ = 8705412.

The previous prime is 20312639. The next prime is 20312681. The reversal of 20312642 is 24621302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 725438 + ... + 725465.

It is an arithmetic number, because the mean of its divisors is an integer number (4352712).

Almost surely, 2^20312642 is an apocalyptic number.

20312642 is a deficient number, since it is larger than the sum of its proper divisors (14509054).

20312642 is a wasteful number, since it uses less digits than its factorization.

20312642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1450912.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 20312642 is about 4506.9548477880. The cubic root of 20312642 is about 272.8488565701.

Adding to 20312642 its reverse (24621302), we get a palindrome (44933944).

The spelling of 20312642 in words is "twenty million, three hundred twelve thousand, six hundred forty-two".