20616959 has 8 divisors (see below), whose sum is σ = 22556928. Its totient is φ = 18687960.

The previous prime is 20616931. The next prime is 20616961. The reversal of 20616959 is 95961602.

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 20616959 - 2¹² = 20612863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20616979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1484 + ... + 6590.

It is an arithmetic number, because the mean of its divisors is an integer number (2819616).

Almost surely, 2^20616959 is an apocalyptic number.

20616959 is a deficient number, since it is larger than the sum of its proper divisors (1939969).

20616959 is a wasteful number, since it uses less digits than its factorization.

20616959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5485.

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 20616959 is about 4540.5901598801. The cubic root of 20616959 is about 274.2046839350.

The spelling of 20616959 in words is "twenty million, six hundred sixteen thousand, nine hundred fifty-nine".