21036586395 has 32 divisors (see below), whose sum is σ = 36815397120. Its totient is φ = 10172615040.

The previous prime is 21036586357. The next prime is 21036586423. The reversal of 21036586395 is 59368563012.

It is not a de Polignac number, because 21036586395 - 2¹³ = 21036578203 is a prime.

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 31 ways as a sum of consecutive naturals, for example, 105664 + ... + 230733.

It is an arithmetic number, because the mean of its divisors is an integer number (1150481160).

Almost surely, 2^21036586395 is an apocalyptic number.

21036586395 is a deficient number, since it is larger than the sum of its proper divisors (15778810725).

21036586395 is a wasteful number, since it uses less digits than its factorization.

21036586395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336795.

The product of its (nonzero) digits is 1166400, while the sum is 48.

The spelling of 21036586395 in words is "twenty-one billion, thirty-six million, five hundred eighty-six thousand, three hundred ninety-five".