21112641935 has 16 divisors (see below), whose sum is σ = 31586706432. Its totient is φ = 13161127200.

The previous prime is 21112641931. The next prime is 21112641937. The reversal of 21112641935 is 53914621112.

It is not a de Polignac number, because 21112641935 - 2² = 21112641931 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21112641895 and 21112641904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21112641931) by changing a digit.

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, 27418631 + ... + 27419400.

It is an arithmetic number, because the mean of its divisors is an integer number (1974169152).

Almost surely, 2^21112641935 is an apocalyptic number.

21112641935 is a deficient number, since it is larger than the sum of its proper divisors (10474064497).

21112641935 is a wasteful number, since it uses less digits than its factorization.

21112641935 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54838054.

The product of its digits is 12960, while the sum is 35.

The spelling of 21112641935 in words is "twenty-one billion, one hundred twelve million, six hundred forty-one thousand, nine hundred thirty-five".