21663012454126 has 8 divisors (see below), whose sum is σ = 32939649074304. Its totient is φ = 10683129429360.

The previous prime is 21663012454121. The next prime is 21663012454141. The reversal of 21663012454126 is 62145421036612.

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

It is a super-2 number, since 2×21663012454126² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21663012454121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74188398670 + ... + 74188398961.

It is an arithmetic number, because the mean of its divisors is an integer number (4117456134288).

Almost surely, 2^{21663012454126} is an apocalyptic number.

21663012454126 is a deficient number, since it is larger than the sum of its proper divisors (11276636620178).

21663012454126 is a wasteful number, since it uses less digits than its factorization.

21663012454126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148376797706.

The product of its (nonzero) digits is 414720, while the sum is 43.

The spelling of 21663012454126 in words is "twenty-one trillion, six hundred sixty-three billion, twelve million, four hundred fifty-four thousand, one hundred twenty-six".