20161147 has 8 divisors (see below), whose sum is σ = 21623760. Its totient is φ = 18738720.

The previous prime is 20161139. The next prime is 20161151. The reversal of 20161147 is 74116102.

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 20161147 - 2³ = 20161139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20161157) 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, 9004 + ... + 11017.

It is an arithmetic number, because the mean of its divisors is an integer number (2702970).

Almost surely, 2^20161147 is an apocalyptic number.

20161147 is a deficient number, since it is larger than the sum of its proper divisors (1462613).

20161147 is a wasteful number, since it uses less digits than its factorization.

20161147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20093.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 20161147 is about 4490.1165909139. The cubic root of 20161147 is about 272.1688461101.

Adding to 20161147 its reverse (74116102), we get a palindrome (94277249).

The spelling of 20161147 in words is "twenty million, one hundred sixty-one thousand, one hundred forty-seven".