21465119 has 4 divisors (see below), whose sum is σ = 23116296. Its totient is φ = 19813944.

The previous prime is 21465071. The next prime is 21465121. The reversal of 21465119 is 91156412.

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 21465119 - 2¹² = 21461023 is a prime.

It is a super-2 number, since 2×21465119² = 921502667368322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21465091 and 21465100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21465149) 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, 825569 + ... + 825594.

It is an arithmetic number, because the mean of its divisors is an integer number (5779074).

Almost surely, 2^21465119 is an apocalyptic number.

21465119 is a deficient number, since it is larger than the sum of its proper divisors (1651177).

21465119 is a wasteful number, since it uses less digits than its factorization.

21465119 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1651176.

The product of its digits is 2160, while the sum is 29.

The square root of 21465119 is about 4633.0464059839. The cubic root of 21465119 is about 277.9144320264.

The spelling of 21465119 in words is "twenty-one million, four hundred sixty-five thousand, one hundred nineteen".