20342587 has 8 divisors (see below), whose sum is σ = 20865600. Its totient is φ = 19823424.

The previous prime is 20342573. The next prime is 20342611. The reversal of 20342587 is 78524302.

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 20342587 - 2¹¹ = 20340539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20342527) 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, 11839 + ... + 13447.

It is an arithmetic number, because the mean of its divisors is an integer number (2608200).

Almost surely, 2^20342587 is an apocalyptic number.

20342587 is a deficient number, since it is larger than the sum of its proper divisors (523013).

20342587 is a wasteful number, since it uses less digits than its factorization.

20342587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1925.

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 20342587 is about 4510.2757121932. The cubic root of 20342587 is about 272.9828691277.

Adding to 20342587 its reverse (78524302), we get a palindrome (98866889).

The spelling of 20342587 in words is "twenty million, three hundred forty-two thousand, five hundred eighty-seven".