20803157 has 8 divisors (see below), whose sum is σ = 22058400. Its totient is φ = 19563984.

The previous prime is 20803141. The next prime is 20803163. The reversal of 20803157 is 75130802.

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

It is a cyclic number.

It is not a de Polignac number, because 20803157 - 2⁴ = 20803141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20803177) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1298 + ... + 6579.

It is an arithmetic number, because the mean of its divisors is an integer number (2757300).

Almost surely, 2^20803157 is an apocalyptic number.

It is an amenable number.

20803157 is a deficient number, since it is larger than the sum of its proper divisors (1255243).

20803157 is a wasteful number, since it uses less digits than its factorization.

20803157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8035.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 20803157 is about 4561.0477962854. The cubic root of 20803157 is about 275.0276864687.

Adding to 20803157 its reverse (75130802), we get a palindrome (95933959).

The spelling of 20803157 in words is "twenty million, eight hundred three thousand, one hundred fifty-seven".