21607435216139 has 4 divisors (see below), whose sum is σ = 21636673965480. Its totient is φ = 21578196466800.

The previous prime is 21607435216123. The next prime is 21607435216153. The reversal of 21607435216139 is 93161253470612.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21607435216139 - 2⁴ = 21607435216123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21607435276139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14619373562 + ... + 14619375039.

It is an arithmetic number, because the mean of its divisors is an integer number (5409168491370).

Almost surely, 2^{21607435216139} is an apocalyptic number.

21607435216139 is a deficient number, since it is larger than the sum of its proper divisors (29238749341).

21607435216139 is an equidigital number, since it uses as much as digits as its factorization.

21607435216139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29238749340.

The product of its (nonzero) digits is 1632960, while the sum is 50.

The spelling of 21607435216139 in words is "twenty-one trillion, six hundred seven billion, four hundred thirty-five million, two hundred sixteen thousand, one hundred thirty-nine".