20161051 has 4 divisors (see below), whose sum is σ = 20176432. Its totient is φ = 20145672.

The previous prime is 20161027. The next prime is 20161079. The reversal of 20161051 is 15016102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20161051 - 2⁵ = 20161019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20161021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5520 + ... + 8413.

It is an arithmetic number, because the mean of its divisors is an integer number (5044108).

Almost surely, 2^20161051 is an apocalyptic number.

20161051 is a deficient number, since it is larger than the sum of its proper divisors (15381).

20161051 is a wasteful number, since it uses less digits than its factorization.

20161051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15380.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 20161051 is about 4490.1059007556. The cubic root of 20161051 is about 272.1684141200.

Adding to 20161051 its reverse (15016102), we get a palindrome (35177153).

The spelling of 20161051 in words is "twenty million, one hundred sixty-one thousand, fifty-one".