21481783534127 has 8 divisors (see below), whose sum is σ = 24550914120096. Its totient is φ = 18412729039872.

The previous prime is 21481783534093. The next prime is 21481783534153. The reversal of 21481783534127 is 72143538718412.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21481783534127 is a prime.

It is a super-2 number, since 2×21481783534127² (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 (21481783533127) 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, 18416678 + ... + 19548339.

It is an arithmetic number, because the mean of its divisors is an integer number (3068864265012).

Almost surely, 2^{21481783534127} is an apocalyptic number.

21481783534127 is a deficient number, since it is larger than the sum of its proper divisors (3069130585969).

21481783534127 is an equidigital number, since it uses as much as digits as its factorization.

21481783534127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38045857.

The product of its digits is 9031680, while the sum is 56.

The spelling of 21481783534127 in words is "twenty-one trillion, four hundred eighty-one billion, seven hundred eighty-three million, five hundred thirty-four thousand, one hundred twenty-seven".