21342682806 has 16 divisors (see below), whose sum is σ = 43385126448. Its totient is φ = 6997600800.

The previous prime is 21342682723. The next prime is 21342682807. The reversal of 21342682806 is 60828624312.

It is a super-3 number, since 3×21342682806³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21342682807) 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, 29156305 + ... + 29157036.

It is an arithmetic number, because the mean of its divisors is an integer number (2711570403).

Almost surely, 2^21342682806 is an apocalyptic number.

21342682806 is an abundant number, since it is smaller than the sum of its proper divisors (22042443642).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21342682806 is a wasteful number, since it uses less digits than its factorization.

21342682806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58313407.

The product of its (nonzero) digits is 221184, while the sum is 42.

The spelling of 21342682806 in words is "twenty-one billion, three hundred forty-two million, six hundred eighty-two thousand, eight hundred six".