21013062536 has 16 divisors (see below), whose sum is σ = 39406392000. Its totient is φ = 10504691344.

The previous prime is 21013062523. The next prime is 21013062557. The reversal of 21013062536 is 63526031012.

It is a junction number, because it is equal to n+sod(n) for n = 21013062499 and 21013062508.

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 3 ways as a sum of consecutive naturals, for example, 180836 + ... + 273363.

It is an arithmetic number, because the mean of its divisors is an integer number (2462899500).

Almost surely, 2^21013062536 is an apocalyptic number.

It is an amenable number.

21013062536 is a deficient number, since it is larger than the sum of its proper divisors (18393329464).

21013062536 is a wasteful number, since it uses less digits than its factorization.

21013062536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459988 (or 459984 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 29.

Adding to 21013062536 its reverse (63526031012), we get a palindrome (84539093548).

The spelling of 21013062536 in words is "twenty-one billion, thirteen million, sixty-two thousand, five hundred thirty-six".