21745715677107 has 8 divisors (see below), whose sum is σ = 28994309505984. Its totient is φ = 14497132816488.

The previous prime is 21745715677073. The next prime is 21745715677111. The reversal of 21745715677107 is 70177651754712.

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

It is not a de Polignac number, because 21745715677107 - 2⁶ = 21745715677043 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21745715677117) 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, 5035368 + ... + 8297370.

It is an arithmetic number, because the mean of its divisors is an integer number (3624288688248).

Almost surely, 2^{21745715677107} is an apocalyptic number.

21745715677107 is a deficient number, since it is larger than the sum of its proper divisors (7248593828877).

21745715677107 is a wasteful number, since it uses less digits than its factorization.

21745715677107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5484129.

The product of its (nonzero) digits is 20168400, while the sum is 60.

The spelling of 21745715677107 in words is "twenty-one trillion, seven hundred forty-five billion, seven hundred fifteen million, six hundred seventy-seven thousand, one hundred seven".