20587137 has 8 divisors (see below), whose sum is σ = 27573504. Its totient is φ = 13662768.

The previous prime is 20587123. The next prime is 20587141. The reversal of 20587137 is 73178502.

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

It is not a de Polignac number, because 20587137 - 2⁷ = 20587009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20587098 and 20587107.

It is not an unprimeable number, because it can be changed into a prime (20587037) 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, 14718 + ... + 16055.

It is an arithmetic number, because the mean of its divisors is an integer number (3446688).

Almost surely, 2^20587137 is an apocalyptic number.

It is an amenable number.

20587137 is a deficient number, since it is larger than the sum of its proper divisors (6986367).

20587137 is a wasteful number, since it uses less digits than its factorization.

20587137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30999.

The product of its (nonzero) digits is 11760, while the sum is 33.

The square root of 20587137 is about 4537.3050371338. The cubic root of 20587137 is about 274.0724096904.

The spelling of 20587137 in words is "twenty million, five hundred eighty-seven thousand, one hundred thirty-seven".