21036785007 has 48 divisors (see below), whose sum is σ = 33139176192. Its totient is φ = 11834323200.

The previous prime is 21036784973. The next prime is 21036785017. The reversal of 21036785007 is 70058763012.

It is not a de Polignac number, because 21036785007 - 2¹¹ = 21036782959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21036785017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2504068 + ... + 2512454.

It is an arithmetic number, because the mean of its divisors is an integer number (690399504).

Almost surely, 2^21036785007 is an apocalyptic number.

21036785007 is a deficient number, since it is larger than the sum of its proper divisors (12102391185).

21036785007 is a wasteful number, since it uses less digits than its factorization.

21036785007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8668 (or 8661 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 39.

The spelling of 21036785007 in words is "twenty-one billion, thirty-six million, seven hundred eighty-five thousand, seven".