21706653126 has 8 divisors (see below), whose sum is σ = 43413306264. Its totient is φ = 7235551040.

The previous prime is 21706653097. The next prime is 21706653169. The reversal of 21706653126 is 62135660712.

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

21706653126 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1808887755 + ... + 1808887766.

It is an arithmetic number, because the mean of its divisors is an integer number (5426663283).

Almost surely, 2^21706653126 is an apocalyptic number.

21706653126 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21706653126 is a wasteful number, since it uses less digits than its factorization.

21706653126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3617775526.

The product of its (nonzero) digits is 90720, while the sum is 39.

The spelling of 21706653126 in words is "twenty-one billion, seven hundred six million, six hundred fifty-three thousand, one hundred twenty-six".