21771725006 has 8 divisors (see below), whose sum is σ = 32661088824. Its totient is φ = 10884695400.

The previous prime is 21771724967. The next prime is 21771725009. The reversal of 21771725006 is 60052717712.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21771725009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 560045 + ... + 597656.

It is an arithmetic number, because the mean of its divisors is an integer number (4082636103).

Almost surely, 2^21771725006 is an apocalyptic number.

21771725006 is a deficient number, since it is larger than the sum of its proper divisors (10889363818).

21771725006 is a wasteful number, since it uses less digits than its factorization.

21771725006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1167106.

The product of its (nonzero) digits is 41160, while the sum is 38.

The spelling of 21771725006 in words is "twenty-one billion, seven hundred seventy-one million, seven hundred twenty-five thousand, six".