20023634 has 8 divisors (see below), whose sum is σ = 30215808. Its totient is φ = 9951700.

The previous prime is 20023609. The next prime is 20023643. The reversal of 20023634 is 43632002.

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, 29642 + ... + 30309.

It is an arithmetic number, because the mean of its divisors is an integer number (3776976).

Almost surely, 2^20023634 is an apocalyptic number.

20023634 is a deficient number, since it is larger than the sum of its proper divisors (10192174).

20023634 is a wasteful number, since it uses less digits than its factorization.

20023634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60120.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 20023634 is about 4474.7775363698. Note that the first 3 decimals coincide. The cubic root of 20023634 is about 271.5486404809.

Adding to 20023634 its reverse (43632002), we get a palindrome (63655636).

The spelling of 20023634 in words is "twenty million, twenty-three thousand, six hundred thirty-four".