21036700079 has 8 divisors (see below), whose sum is σ = 22907478000. Its totient is φ = 19242280512.

The previous prime is 21036700049. The next prime is 21036700123. The reversal of 21036700079 is 97000763012.

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 21036700079 - 2²⁸ = 20768264623 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 (21036700039) 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, 19089014 + ... + 19090115.

It is an arithmetic number, because the mean of its divisors is an integer number (2863434750).

Almost surely, 2^21036700079 is an apocalyptic number.

21036700079 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

21036700079 is a deficient number, since it is larger than the sum of its proper divisors (1870777921).

21036700079 is a wasteful number, since it uses less digits than its factorization.

21036700079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38179177.

The product of its (nonzero) digits is 15876, while the sum is 35.

The spelling of 21036700079 in words is "twenty-one billion, thirty-six million, seven hundred thousand, seventy-nine".