21036700395 has 24 divisors (see below), whose sum is σ = 36469388592. Its totient is φ = 11217796800.

The previous prime is 21036700393. The next prime is 21036700417. The reversal of 21036700395 is 59300763012.

It is not a de Polignac number, because 21036700395 - 2¹ = 21036700393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21036700393) 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 23 ways as a sum of consecutive naturals, for example, 280165 + ... + 347225.

It is an arithmetic number, because the mean of its divisors is an integer number (1519557858).

Almost surely, 2^21036700395 is an apocalyptic number.

21036700395 is a deficient number, since it is larger than the sum of its proper divisors (15432688197).

21036700395 is a wasteful number, since it uses less digits than its factorization.

21036700395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74043 (or 74040 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 36.

The spelling of 21036700395 in words is "twenty-one billion, thirty-six million, seven hundred thousand, three hundred ninety-five".