21625571206 has 16 divisors (see below), whose sum is σ = 32760000000. Its totient is φ = 10705614408.

The previous prime is 21625571197. The next prime is 21625571207. The reversal of 21625571206 is 60217552612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21625571207) 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, 1537795 + ... + 1551793.

It is an arithmetic number, because the mean of its divisors is an integer number (2047500000).

Almost surely, 2^21625571206 is an apocalyptic number.

21625571206 is a deficient number, since it is larger than the sum of its proper divisors (11134428794).

21625571206 is a wasteful number, since it uses less digits than its factorization.

21625571206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21603.

The product of its (nonzero) digits is 50400, while the sum is 37.

The spelling of 21625571206 in words is "twenty-one billion, six hundred twenty-five million, five hundred seventy-one thousand, two hundred six".