20800634 has 8 divisors (see below), whose sum is σ = 31712628. Its totient is φ = 10229760.

The previous prime is 20800631. The next prime is 20800643. The reversal of 20800634 is 43600802.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 17247409 + 3553225 = 4153^2 + 1885^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20800631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85127 + ... + 85370.

Almost surely, 2^20800634 is an apocalyptic number.

20800634 is a deficient number, since it is larger than the sum of its proper divisors (10911994).

20800634 is a wasteful number, since it uses less digits than its factorization.

20800634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170560.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 20800634 is about 4560.7712067149. The cubic root of 20800634 is about 275.0165675969.

The spelling of 20800634 in words is "twenty million, eight hundred thousand, six hundred thirty-four".