21706070007 has 8 divisors (see below), whose sum is σ = 29024354800. Its totient is φ = 14429249280.

The previous prime is 21706069967. The next prime is 21706070027. The reversal of 21706070007 is 70007060712.

It is a happy number.

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

It is not a de Polignac number, because 21706070007 - 2⁸ = 21706069751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21706070027) 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, 10364794 + ... + 10366887.

It is an arithmetic number, because the mean of its divisors is an integer number (3628044350).

Almost surely, 2^21706070007 is an apocalyptic number.

21706070007 is a deficient number, since it is larger than the sum of its proper divisors (7318284793).

21706070007 is a wasteful number, since it uses less digits than its factorization.

21706070007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20732033.

The product of its (nonzero) digits is 4116, while the sum is 30.

The spelling of 21706070007 in words is "twenty-one billion, seven hundred six million, seventy thousand, seven".