20634398 has 8 divisors (see below), whose sum is σ = 31706640. Its totient is φ = 10065520.

The previous prime is 20634389. The next prime is 20634403. The reversal of 20634398 is 89343602.

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, 125738 + ... + 125901.

It is an arithmetic number, because the mean of its divisors is an integer number (3963330).

Almost surely, 2^20634398 is an apocalyptic number.

20634398 is a deficient number, since it is larger than the sum of its proper divisors (11072242).

20634398 is a wasteful number, since it uses less digits than its factorization.

20634398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251682.

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 20634398 is about 4542.5100990532. The cubic root of 20634398 is about 274.2819748012.

The spelling of 20634398 in words is "twenty million, six hundred thirty-four thousand, three hundred ninety-eight".