21014161 has 8 divisors (see below), whose sum is σ = 24254784. Its totient is φ = 17833200.

The previous prime is 21014131. The next prime is 21014167. The reversal of 21014161 is 16141012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21014161 - 2²¹ = 18917009 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21014167) 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, 14155 + ... + 15568.

It is an arithmetic number, because the mean of its divisors is an integer number (3031848).

Almost surely, 2^21014161 is an apocalyptic number.

It is an amenable number.

21014161 is a deficient number, since it is larger than the sum of its proper divisors (3240623).

21014161 is a wasteful number, since it uses less digits than its factorization.

21014161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29831.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 21014161 is about 4584.1205263387. The cubic root of 21014161 is about 275.9544181884.

Adding to 21014161 its reverse (16141012), we get a palindrome (37155173).

The spelling of 21014161 in words is "twenty-one million, fourteen thousand, one hundred sixty-one".