21419169 has 8 divisors (see below), whose sum is σ = 29166720. Its totient is φ = 13975536.

The previous prime is 21419143. The next prime is 21419173. The reversal of 21419169 is 96191412.

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

It is a de Polignac number, because none of the positive numbers 2^k-21419169 is a prime.

It is a super-2 number, since 2×21419169² = 917561601301122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21419119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75814 + ... + 76095.

It is an arithmetic number, because the mean of its divisors is an integer number (3645840).

Almost surely, 2^21419169 is an apocalyptic number.

It is an amenable number.

21419169 is a deficient number, since it is larger than the sum of its proper divisors (7747551).

21419169 is a wasteful number, since it uses less digits than its factorization.

21419169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151959.

The product of its digits is 3888, while the sum is 33.

The square root of 21419169 is about 4628.0848090760. The cubic root of 21419169 is about 277.7159815186.

The spelling of 21419169 in words is "twenty-one million, four hundred nineteen thousand, one hundred sixty-nine".