20656033 has 8 divisors (see below), whose sum is σ = 21689280. Its totient is φ = 19644240.

The previous prime is 20655997. The next prime is 20656057. The reversal of 20656033 is 33065602.

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 20656033 - 2¹⁷ = 20524961 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20655989 and 20656007.

It is not an unprimeable number, because it can be changed into a prime (20656073) 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, 3373 + ... + 7258.

It is an arithmetic number, because the mean of its divisors is an integer number (2711160).

Almost surely, 2^20656033 is an apocalyptic number.

It is an amenable number.

20656033 is a deficient number, since it is larger than the sum of its proper divisors (1033247).

20656033 is a wasteful number, since it uses less digits than its factorization.

20656033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10727.

The product of its (nonzero) digits is 3240, while the sum is 25.

The square root of 20656033 is about 4544.8908677767. The cubic root of 20656033 is about 274.3778021310.

The spelling of 20656033 in words is "twenty million, six hundred fifty-six thousand, thirty-three".