21329106 has 8 divisors (see below), whose sum is σ = 42658224. Its totient is φ = 7109700.

The previous prime is 21329081. The next prime is 21329107. The reversal of 21329106 is 60192312.

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

21329106 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (21329107) 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, 1777420 + ... + 1777431.

It is an arithmetic number, because the mean of its divisors is an integer number (5332278).

Almost surely, 2^21329106 is an apocalyptic number.

21329106 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21329106 is a wasteful number, since it uses less digits than its factorization.

21329106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3554856.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 21329106 is about 4618.3445085875. The cubic root of 21329106 is about 277.3261893474.

The spelling of 21329106 in words is "twenty-one million, three hundred twenty-nine thousand, one hundred six".