20323641 has 8 divisors (see below), whose sum is σ = 29182720. Its totient is φ = 12506832.

The previous prime is 20323637. The next prime is 20323643. The reversal of 20323641 is 14632302.

It is a happy number.

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

It is not a de Polignac number, because 20323641 - 2² = 20323637 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20323643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 260521 + ... + 260598.

It is an arithmetic number, because the mean of its divisors is an integer number (3647840).

Almost surely, 2^20323641 is an apocalyptic number.

It is an amenable number.

20323641 is a deficient number, since it is larger than the sum of its proper divisors (8859079).

20323641 is a wasteful number, since it uses less digits than its factorization.

20323641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521135.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 20323641 is about 4508.1749078757. The cubic root of 20323641 is about 272.8980955787.

Adding to 20323641 its reverse (14632302), we get a palindrome (34955943).

The spelling of 20323641 in words is "twenty million, three hundred twenty-three thousand, six hundred forty-one".