21706346213 has 8 divisors (see below), whose sum is σ = 22475232000. Its totient is φ = 20938819888.

The previous prime is 21706346203. The next prime is 21706346261. The reversal of 21706346213 is 31264360712.

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

It is not a de Polignac number, because 21706346213 - 2⁴ = 21706346197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21706346203) 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, 307313 + ... + 371286.

It is an arithmetic number, because the mean of its divisors is an integer number (2809404000).

Almost surely, 2^21706346213 is an apocalyptic number.

It is an amenable number.

21706346213 is a deficient number, since it is larger than the sum of its proper divisors (768885787).

21706346213 is a wasteful number, since it uses less digits than its factorization.

21706346213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679731.

The product of its (nonzero) digits is 36288, while the sum is 35.

The spelling of 21706346213 in words is "twenty-one billion, seven hundred six million, three hundred forty-six thousand, two hundred thirteen".