21719630133 has 12 divisors (see below), whose sum is σ = 31769924160. Its totient is φ = 14296464936.

The previous prime is 21719630081. The next prime is 21719630137. The reversal of 21719630133 is 33103691712.

21719630133 is a `hidden beast` number, since 2 + 1 + 7 + 1 + 9 + 630 + 13 + 3 = 666.

It is not a de Polignac number, because 21719630133 - 2⁹ = 21719629621 is a prime.

It is a super-2 number, since 2×21719630133² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21719630137) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15273291 + ... + 15274712.

It is an arithmetic number, because the mean of its divisors is an integer number (2647493680).

Almost surely, 2^21719630133 is an apocalyptic number.

It is an amenable number.

21719630133 is a deficient number, since it is larger than the sum of its proper divisors (10050294027).

21719630133 is a wasteful number, since it uses less digits than its factorization.

21719630133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30548088 (or 30548085 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 36.

The spelling of 21719630133 in words is "twenty-one billion, seven hundred nineteen million, six hundred thirty thousand, one hundred thirty-three".