20147161651 has 16 divisors (see below), whose sum is σ = 21375827200. Its totient is φ = 18935532000.

The previous prime is 20147161631. The next prime is 20147161687. The reversal of 20147161651 is 15616174102.

It is a 5-Lehmer number, since φ(20147161651) divides (20147161651-1)⁵.

It is a cyclic number.

It is not a de Polignac number, because 20147161651 - 2¹³ = 20147153459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20147161631) 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 15 ways as a sum of consecutive naturals, for example, 6101701 + ... + 6105001.

It is an arithmetic number, because the mean of its divisors is an integer number (1335989200).

Almost surely, 2^20147161651 is an apocalyptic number.

20147161651 is the 81950-th hex number.

20147161651 is a deficient number, since it is larger than the sum of its proper divisors (1228665549).

20147161651 is a wasteful number, since it uses less digits than its factorization.

20147161651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5770.

The product of its (nonzero) digits is 10080, while the sum is 34.

The spelling of 20147161651 in words is "twenty billion, one hundred forty-seven million, one hundred sixty-one thousand, six hundred fifty-one".