20816605151 has 8 divisors (see below), whose sum is σ = 20985754944. Its totient is φ = 20647704960.

The previous prime is 20816605141. The next prime is 20816605153. The reversal of 20816605151 is 15150661802.

It is a happy number.

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 20816605151 - 2⁶ = 20816605087 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 (20816605153) 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, 106931 + ... + 230363.

It is an arithmetic number, because the mean of its divisors is an integer number (2623219368).

Almost surely, 2^20816605151 is an apocalyptic number.

20816605151 is a deficient number, since it is larger than the sum of its proper divisors (169149793).

20816605151 is a wasteful number, since it uses less digits than its factorization.

20816605151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124801.

The product of its (nonzero) digits is 14400, while the sum is 35.

The spelling of 20816605151 in words is "twenty billion, eight hundred sixteen million, six hundred five thousand, one hundred fifty-one".