21083541919 has 8 divisors (see below), whose sum is σ = 24210766080. Its totient is φ = 18158074200.

The previous prime is 21083541901. The next prime is 21083541931. The reversal of 21083541919 is 91914538012.

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 21083541919 - 2⁵ = 21083541887 is a prime.

It is a super-2 number, since 2×21083541919² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21083541319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50438887 + ... + 50439304.

It is an arithmetic number, because the mean of its divisors is an integer number (3026345760).

Almost surely, 2^21083541919 is an apocalyptic number.

21083541919 is a deficient number, since it is larger than the sum of its proper divisors (3127224161).

21083541919 is a wasteful number, since it uses less digits than its factorization.

21083541919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100878221.

The product of its (nonzero) digits is 77760, while the sum is 43.

The spelling of 21083541919 in words is "twenty-one billion, eighty-three million, five hundred forty-one thousand, nine hundred nineteen".