21102413 has 8 divisors (see below), whose sum is σ = 22315776. Its totient is φ = 19922400.

The previous prime is 21102409. The next prime is 21102421. The reversal of 21102413 is 31420112.

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

It is a cyclic number.

It is not a de Polignac number, because 21102413 - 2² = 21102409 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21102463) 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, 7031 + ... + 9572.

It is an arithmetic number, because the mean of its divisors is an integer number (2789472).

Almost surely, 2^21102413 is an apocalyptic number.

It is an amenable number.

21102413 is a deficient number, since it is larger than the sum of its proper divisors (1213363).

21102413 is a wasteful number, since it uses less digits than its factorization.

21102413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16675.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 21102413 is about 4593.7362788911. The cubic root of 21102413 is about 276.3401821276.

Adding to 21102413 its reverse (31420112), we get a palindrome (52522525).

The spelling of 21102413 in words is "twenty-one million, one hundred two thousand, four hundred thirteen".