21661031335014 has 24 divisors (see below), whose sum is σ = 46932462284760. Its totient is φ = 7220308743648.

The previous prime is 21661031334989. The next prime is 21661031335019. The reversal of 21661031335014 is 41053313016612.

21661031335014 is a `hidden beast` number, since 2 + 1 + 6 + 6 + 10 + 3 + 133 + 501 + 4 = 666.

It is a super-2 number, since 2×21661031335014² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21661031335014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21661031335019) 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 11 ways as a sum of consecutive naturals, for example, 1038129 + ... + 6663315.

It is an arithmetic number, because the mean of its divisors is an integer number (1955519261865).

Almost surely, 2^{21661031335014} is an apocalyptic number.

21661031335014 is an abundant number, since it is smaller than the sum of its proper divisors (25271430949746).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21661031335014 is a wasteful number, since it uses less digits than its factorization.

21661031335014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5839124 (or 5839121 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The spelling of 21661031335014 in words is "twenty-one trillion, six hundred sixty-one billion, thirty-one million, three hundred thirty-five thousand, fourteen".