21663010025135 has 8 divisors (see below), whose sum is σ = 26151274378656. Its totient is φ = 17226633121120.

The previous prime is 21663010025057. The next prime is 21663010025147. The reversal of 21663010025135 is 53152001036612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21663010025135 - 2¹² = 21663010021039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21663010025095 and 21663010025104.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12971861456 + ... + 12971863125.

It is an arithmetic number, because the mean of its divisors is an integer number (3268909297332).

Almost surely, 2^{21663010025135} is an apocalyptic number.

21663010025135 is a deficient number, since it is larger than the sum of its proper divisors (4488264353521).

21663010025135 is a wasteful number, since it uses less digits than its factorization.

21663010025135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25943724753.

The product of its (nonzero) digits is 32400, while the sum is 35.

The spelling of 21663010025135 in words is "twenty-one trillion, six hundred sixty-three billion, ten million, twenty-five thousand, one hundred thirty-five".