21106415788799 has 8 divisors (see below), whose sum is σ = 23126613378048. Its totient is φ = 19103123619160.

The previous prime is 21106415788771. The next prime is 21106415788813. The reversal of 21106415788799 is 99788751460112.

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 21106415788799 - 2⁸ = 21106415788543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21106415788399) 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, 4226352287 + ... + 4226357280.

It is an arithmetic number, because the mean of its divisors is an integer number (2890826672256).

Almost surely, 2^{21106415788799} is an apocalyptic number.

21106415788799 is a deficient number, since it is larger than the sum of its proper divisors (2020197589249).

21106415788799 is a wasteful number, since it uses less digits than its factorization.

21106415788799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8452709805.

The product of its (nonzero) digits is 60963840, while the sum is 68.

The spelling of 21106415788799 in words is "twenty-one trillion, one hundred six billion, four hundred fifteen million, seven hundred eighty-eight thousand, seven hundred ninety-nine".