20886137 has 8 divisors (see below), whose sum is σ = 21227976. Its totient is φ = 20547072.

The previous prime is 20886091. The next prime is 20886143. The reversal of 20886137 is 73168802.

It can be written as a sum of positive squares in 4 ways, for example, as 15178816 + 5707321 = 3896^2 + 2389^2 .

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 20886137 - 2²² = 16691833 is a prime.

It is a super-3 number, since 3×20886137³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20886097 and 20886106.

It is not an unprimeable number, because it can be changed into a prime (20886637) 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, 18563 + ... + 19655.

It is an arithmetic number, because the mean of its divisors is an integer number (2653497).

Almost surely, 2^20886137 is an apocalyptic number.

It is an amenable number.

20886137 is a deficient number, since it is larger than the sum of its proper divisors (341839).

20886137 is a wasteful number, since it uses less digits than its factorization.

20886137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1387.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 20886137 is about 4570.1353371645. The cubic root of 20886137 is about 275.3928797659.

The spelling of 20886137 in words is "twenty million, eight hundred eighty-six thousand, one hundred thirty-seven".