20636398 has 8 divisors (see below), whose sum is σ = 31538808. Its totient is φ = 10123464.

The previous prime is 20636389. The next prime is 20636401. The reversal of 20636398 is 89363602.

It is a happy number.

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

It is a congruent number.

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, 97236 + ... + 97447.

It is an arithmetic number, because the mean of its divisors is an integer number (3942351).

Almost surely, 2^20636398 is an apocalyptic number.

20636398 is a deficient number, since it is larger than the sum of its proper divisors (10902410).

20636398 is a wasteful number, since it uses less digits than its factorization.

20636398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194738.

The product of its (nonzero) digits is 46656, while the sum is 37.

The square root of 20636398 is about 4542.7302363226. The cubic root of 20636398 is about 274.2908361570.

It can be divided in two parts, 20636 and 398, that multiplied together give a palindrome (8213128).

The spelling of 20636398 in words is "twenty million, six hundred thirty-six thousand, three hundred ninety-eight".