21036586378 has 8 divisors (see below), whose sum is σ = 31555500768. Its totient is φ = 10518086124.

The previous prime is 21036586357. The next prime is 21036586423. The reversal of 21036586378 is 87368563012.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119875 + ... + 237577.

It is an arithmetic number, because the mean of its divisors is an integer number (3944437596).

Almost surely, 2^21036586378 is an apocalyptic number.

21036586378 is a deficient number, since it is larger than the sum of its proper divisors (10518914390).

21036586378 is a wasteful number, since it uses less digits than its factorization.

21036586378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207068.

The product of its (nonzero) digits is 1451520, while the sum is 49.

The spelling of 21036586378 in words is "twenty-one billion, thirty-six million, five hundred eighty-six thousand, three hundred seventy-eight".