21161414 has 16 divisors (see below), whose sum is σ = 32640000. Its totient is φ = 10285704.

The previous prime is 21161407. The next prime is 21161417. The reversal of 21161414 is 41416112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21161417) 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, 9587 + ... + 11585.

It is an arithmetic number, because the mean of its divisors is an integer number (2040000).

Almost surely, 2^21161414 is an apocalyptic number.

21161414 is a deficient number, since it is larger than the sum of its proper divisors (11478586).

21161414 is a wasteful number, since it uses less digits than its factorization.

21161414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2147.

The product of its digits is 192, while the sum is 20.

The square root of 21161414 is about 4600.1536930846. The cubic root of 21161414 is about 276.5974856461.

Adding to 21161414 its reverse (41416112), we get a palindrome (62577526).

The spelling of 21161414 in words is "twenty-one million, one hundred sixty-one thousand, four hundred fourteen".