21374263617117 has 32 divisors (see below), whose sum is σ = 28874924413440. Its totient is φ = 14061950360640.

The previous prime is 21374263617107. The next prime is 21374263617121. The reversal of 21374263617117 is 71171636247312.

It is not a de Polignac number, because 21374263617117 - 2¹¹ = 21374263615069 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21374263617117.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21374263617107) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1396364178 + ... + 1396379484.

It is an arithmetic number, because the mean of its divisors is an integer number (902341387920).

Almost surely, 2^{21374263617117} is an apocalyptic number.

It is an amenable number.

21374263617117 is a deficient number, since it is larger than the sum of its proper divisors (7500660796323).

21374263617117 is a wasteful number, since it uses less digits than its factorization.

21374263617117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21353.

The product of its digits is 1778112, while the sum is 51.

The spelling of 21374263617117 in words is "twenty-one trillion, three hundred seventy-four billion, two hundred sixty-three million, six hundred seventeen thousand, one hundred seventeen".