21700702005 has 8 divisors (see below), whose sum is σ = 34721123232. Its totient is φ = 11573707728.

The previous prime is 21700701989. The next prime is 21700702007. The reversal of 21700702005 is 50020700712.

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

It is not a de Polignac number, because 21700702005 - 2⁴ = 21700701989 is a prime.

It is a super-2 number, since 2×21700702005² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21700702007) 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, 723356719 + ... + 723356748.

It is an arithmetic number, because the mean of its divisors is an integer number (4340140404).

Almost surely, 2^21700702005 is an apocalyptic number.

It is an amenable number.

21700702005 is a deficient number, since it is larger than the sum of its proper divisors (13020421227).

21700702005 is a wasteful number, since it uses less digits than its factorization.

21700702005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1446713475.

The product of its (nonzero) digits is 980, while the sum is 24.

The spelling of 21700702005 in words is "twenty-one billion, seven hundred million, seven hundred two thousand, five".