20883157 has 8 divisors (see below), whose sum is σ = 22170456. Its totient is φ = 19602432.

The previous prime is 20883143. The next prime is 20883169. The reversal of 20883157 is 75138802.

It can be written as a sum of positive squares in 4 ways, for example, as 7396 + 20875761 = 86^2 + 4569^2 .

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 20883157 - 2¹¹ = 20881109 is a prime.

It is a super-2 number, since 2×20883157² = 872212492573298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20883257) 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, 5943 + ... + 8779.

It is an arithmetic number, because the mean of its divisors is an integer number (2771307).

Almost surely, 2^20883157 is an apocalyptic number.

It is an amenable number.

20883157 is a deficient number, since it is larger than the sum of its proper divisors (1287299).

20883157 is a wasteful number, since it uses less digits than its factorization.

20883157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3287.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 20883157 is about 4569.8092958022. The cubic root of 20883157 is about 275.3797816071.

The spelling of 20883157 in words is "twenty million, eight hundred eighty-three thousand, one hundred fifty-seven".