21241640420327 has 8 divisors (see below), whose sum is σ = 21305011328832. Its totient is φ = 21178344376800.

The previous prime is 21241640420311. The next prime is 21241640420393. The reversal of 21241640420327 is 72302404614212.

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

It is a cyclic number.

It is not a de Polignac number, because 21241640420327 - 2⁴ = 21241640420311 is a prime.

It is a super-3 number, since 3×21241640420327³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21241640420827) 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, 18147908 + ... + 19282889.

It is an arithmetic number, because the mean of its divisors is an integer number (2663126416104).

Almost surely, 2^{21241640420327} is an apocalyptic number.

21241640420327 is a deficient number, since it is larger than the sum of its proper divisors (63370908505).

21241640420327 is a wasteful number, since it uses less digits than its factorization.

21241640420327 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37432489.

The product of its (nonzero) digits is 129024, while the sum is 38.

The spelling of 21241640420327 in words is "twenty-one trillion, two hundred forty-one billion, six hundred forty million, four hundred twenty thousand, three hundred twenty-seven".