20656141 has 8 divisors (see below), whose sum is σ = 22567104. Its totient is φ = 18750720.

The previous prime is 20656121. The next prime is 20656183. The reversal of 20656141 is 14165602.

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 20656141 - 2¹⁵ = 20623373 is a prime.

It is a super-2 number, since 2×20656141² = 853352322023762, 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 (20656121) 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, 12616 + ... + 14158.

It is an arithmetic number, because the mean of its divisors is an integer number (2820888).

Almost surely, 2^20656141 is an apocalyptic number.

It is an amenable number.

20656141 is a deficient number, since it is larger than the sum of its proper divisors (1910963).

20656141 is a wasteful number, since it uses less digits than its factorization.

20656141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2771.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 20656141 is about 4544.9027492346. The cubic root of 20656141 is about 274.3782803246.

It can be divided in two parts, 206561 and 41, that added together give a palindrome (206602).

The spelling of 20656141 in words is "twenty million, six hundred fifty-six thousand, one hundred forty-one".