21387377036 has 12 divisors (see below), whose sum is σ = 37623868800. Its totient is φ = 10637700240.

The previous prime is 21387377021. The next prime is 21387377041. The reversal of 21387377036 is 63077378312.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 13996211 + ... + 13997738.

It is an arithmetic number, because the mean of its divisors is an integer number (3135322400).

Almost surely, 2^21387377036 is an apocalyptic number.

It is an amenable number.

21387377036 is a deficient number, since it is larger than the sum of its proper divisors (16236491764).

21387377036 is a wasteful number, since it uses less digits than its factorization.

21387377036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27994144 (or 27994142 counting only the distinct ones).

The product of its (nonzero) digits is 889056, while the sum is 47.

The spelling of 21387377036 in words is "twenty-one billion, three hundred eighty-seven million, three hundred seventy-seven thousand, thirty-six".