20800653 has 8 divisors (see below), whose sum is σ = 28410816. Its totient is φ = 13528800.

The previous prime is 20800643. The next prime is 20800667. The reversal of 20800653 is 35600802.

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

It is not a de Polignac number, because 20800653 - 2⁹ = 20800141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20800603) 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, 84433 + ... + 84678.

It is an arithmetic number, because the mean of its divisors is an integer number (3551352).

Almost surely, 2^20800653 is an apocalyptic number.

It is an amenable number.

20800653 is a deficient number, since it is larger than the sum of its proper divisors (7610163).

20800653 is a wasteful number, since it uses less digits than its factorization.

20800653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169155.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 20800653 is about 4560.7732896955. The cubic root of 20800653 is about 275.0166513333.

The spelling of 20800653 in words is "twenty million, eight hundred thousand, six hundred fifty-three".