21305616035 has 16 divisors (see below), whose sum is σ = 28852748640. Its totient is φ = 14960682240.

The previous prime is 21305615999. The next prime is 21305616071. The reversal of 21305616035 is 53061650312.

It is an interprime number because it is at equal distance from previous prime (21305615999) and next prime (21305616071).

It is not a de Polignac number, because 21305616035 - 2¹² = 21305611939 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21305615992 and 21305616010.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6677282 + ... + 6680471.

It is an arithmetic number, because the mean of its divisors is an integer number (1803296790).

Almost surely, 2^21305616035 is an apocalyptic number.

21305616035 is a deficient number, since it is larger than the sum of its proper divisors (7547132605).

21305616035 is a wasteful number, since it uses less digits than its factorization.

21305616035 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13357798.

The product of its (nonzero) digits is 16200, while the sum is 32.

It can be divided in two parts, 2130 and 5616035, that added together give a palindrome (5618165).

The spelling of 21305616035 in words is "twenty-one billion, three hundred five million, six hundred sixteen thousand, thirty-five".