21663524043411 has 8 divisors (see below), whose sum is σ = 30404946025920. Its totient is φ = 13682225711592.

The previous prime is 21663524043331. The next prime is 21663524043443. The reversal of 21663524043411 is 11434042536612.

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

It is not a de Polignac number, because 21663524043411 - 2⁹ = 21663524042899 is a prime.

It is a super-2 number, since 2×21663524043411² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21663524043911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190030912605 + ... + 190030912718.

It is an arithmetic number, because the mean of its divisors is an integer number (3800618253240).

Almost surely, 2^{21663524043411} is an apocalyptic number.

21663524043411 is a deficient number, since it is larger than the sum of its proper divisors (8741421982509).

21663524043411 is a wasteful number, since it uses less digits than its factorization.

21663524043411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380061825345.

The product of its (nonzero) digits is 414720, while the sum is 42.

The spelling of 21663524043411 in words is "twenty-one trillion, six hundred sixty-three billion, five hundred twenty-four million, forty-three thousand, four hundred eleven".