21036094538 has 16 divisors (see below), whose sum is σ = 33265512000. Its totient is φ = 9957019776.

The previous prime is 21036094493. The next prime is 21036094553. The reversal of 21036094538 is 83549063012.

It is a junction number, because it is equal to n+sod(n) for n = 21036094495 and 21036094504.

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 7 ways as a sum of consecutive naturals, for example, 2352788 + ... + 2361711.

It is an arithmetic number, because the mean of its divisors is an integer number (2079094500).

Almost surely, 2^21036094538 is an apocalyptic number.

21036094538 is a deficient number, since it is larger than the sum of its proper divisors (12229417462).

21036094538 is a wasteful number, since it uses less digits than its factorization.

21036094538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4714621.

The product of its (nonzero) digits is 155520, while the sum is 41.

The spelling of 21036094538 in words is "twenty-one billion, thirty-six million, ninety-four thousand, five hundred thirty-eight".