21625652706 has 32 divisors (see below), whose sum is σ = 52337715840. Its totient is φ = 5815301376.

The previous prime is 21625652677. The next prime is 21625652753. The reversal of 21625652706 is 60725652612.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15143301 + ... + 15144728.

It is an arithmetic number, because the mean of its divisors is an integer number (1635553620).

Almost surely, 2^21625652706 is an apocalyptic number.

21625652706 is an abundant number, since it is smaller than the sum of its proper divisors (30712063134).

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

21625652706 is a wasteful number, since it uses less digits than its factorization.

21625652706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30288058.

The product of its (nonzero) digits is 302400, while the sum is 42.

The spelling of 21625652706 in words is "twenty-one billion, six hundred twenty-five million, six hundred fifty-two thousand, seven hundred six".