20652137 has 8 divisors (see below), whose sum is σ = 23509440. Its totient is φ = 17958160.

The previous prime is 20652133. The next prime is 20652157. The reversal of 20652137 is 73125602.

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

It is not a de Polignac number, because 20652137 - 2² = 20652133 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20652133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40562 + ... + 41067.

It is an arithmetic number, because the mean of its divisors is an integer number (2938680).

Almost surely, 2^20652137 is an apocalyptic number.

It is an amenable number.

20652137 is a deficient number, since it is larger than the sum of its proper divisors (2857303).

20652137 is a wasteful number, since it uses less digits than its factorization.

20652137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81663.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 20652137 is about 4544.4622344123. The cubic root of 20652137 is about 274.3605506234.

Adding to 20652137 its reverse (73125602), we get a palindrome (93777739).

The spelling of 20652137 in words is "twenty million, six hundred fifty-two thousand, one hundred thirty-seven".