21619014 has 8 divisors (see below), whose sum is σ = 43238040. Its totient is φ = 7206336.

The previous prime is 21619009. The next prime is 21619021. The reversal of 21619014 is 41091612.

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

21619014 is an admirable number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1801579 + ... + 1801590.

It is an arithmetic number, because the mean of its divisors is an integer number (5404755).

Almost surely, 2^21619014 is an apocalyptic number.

21619014 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.

21619014 is a wasteful number, since it uses less digits than its factorization.

21619014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3603174.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 21619014 is about 4649.6251461811. The cubic root of 21619014 is about 278.5770238005.

It can be divided in two parts, 2161 and 9014, that added together give a triangular number (11175 = T₁₄₉).

The spelling of 21619014 in words is "twenty-one million, six hundred nineteen thousand, fourteen".