21136027205697 has 16 divisors (see below), whose sum is σ = 28219126010880. Its totient is φ = 14071810309200.

The previous prime is 21136027205693. The next prime is 21136027205723. The reversal of 21136027205697 is 79650272063112.

It is not a de Polignac number, because 21136027205697 - 2² = 21136027205693 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21136027205693) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22604172 + ... + 23520642.

It is an arithmetic number, because the mean of its divisors is an integer number (1763695375680).

Almost surely, 2^{21136027205697} is an apocalyptic number.

It is an amenable number.

21136027205697 is a deficient number, since it is larger than the sum of its proper divisors (7083098805183).

21136027205697 is an equidigital number, since it uses as much as digits as its factorization.

21136027205697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 926764.

The product of its (nonzero) digits is 1905120, while the sum is 51.

The spelling of 21136027205697 in words is "twenty-one trillion, one hundred thirty-six billion, twenty-seven million, two hundred five thousand, six hundred ninety-seven".