21079502419 has 4 divisors (see below), whose sum is σ = 21759486400. Its totient is φ = 20399518440.

The previous prime is 21079502377. The next prime is 21079502449. The reversal of 21079502419 is 91420597012.

It is a happy number.

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 21079502419 - 2⁹ = 21079501907 is a prime.

It is a super-2 number, since 2×21079502419² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21079502449) 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, 339991944 + ... + 339992005.

It is an arithmetic number, because the mean of its divisors is an integer number (5439871600).

Almost surely, 2^21079502419 is an apocalyptic number.

21079502419 is a deficient number, since it is larger than the sum of its proper divisors (679983981).

21079502419 is an equidigital number, since it uses as much as digits as its factorization.

21079502419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679983980.

The product of its (nonzero) digits is 45360, while the sum is 40.

The spelling of 21079502419 in words is "twenty-one billion, seventy-nine million, five hundred two thousand, four hundred nineteen".