21033654735 has 16 divisors (see below), whose sum is σ = 34563411936. Its totient is φ = 10914761088.

The previous prime is 21033654703. The next prime is 21033654773. The reversal of 21033654735 is 53745633012.

It is not a de Polignac number, because 21033654735 - 2⁵ = 21033654703 is a prime.

It is a super-2 number, since 2×21033654735² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21033654693 and 21033654702.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 18948684 + ... + 18949793.

It is an arithmetic number, because the mean of its divisors is an integer number (2160213246).

Almost surely, 2^21033654735 is an apocalyptic number.

21033654735 is a deficient number, since it is larger than the sum of its proper divisors (13529757201).

21033654735 is a wasteful number, since it uses less digits than its factorization.

21033654735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37898522.

The product of its (nonzero) digits is 226800, while the sum is 39.

The spelling of 21033654735 in words is "twenty-one billion, thirty-three million, six hundred fifty-four thousand, seven hundred thirty-five".