20161451 has 4 divisors (see below), whose sum is σ = 21222600. Its totient is φ = 19100304.

The previous prime is 20161441. The next prime is 20161457. The reversal of 20161451 is 15416102.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20161451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20161457) 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, 530546 + ... + 530583.

It is an arithmetic number, because the mean of its divisors is an integer number (5305650).

Almost surely, 2^20161451 is an apocalyptic number.

20161451 is a deficient number, since it is larger than the sum of its proper divisors (1061149).

20161451 is a wasteful number, since it uses less digits than its factorization.

20161451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1061148.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 20161451 is about 4490.1504429139. The cubic root of 20161451 is about 272.1702140699.

Adding to 20161451 its reverse (15416102), we get a palindrome (35577553).

The spelling of 20161451 in words is "twenty million, one hundred sixty-one thousand, four hundred fifty-one".