21200526606 has 16 divisors (see below), whose sum is σ = 48458346624. Its totient is φ = 6057293304.

The previous prime is 21200526601. The next prime is 21200526619. The reversal of 21200526606 is 60662500212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21200526601) 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, 252387180 + ... + 252387263.

It is an arithmetic number, because the mean of its divisors is an integer number (3028646664).

Almost surely, 2^21200526606 is an apocalyptic number.

21200526606 is an abundant number, since it is smaller than the sum of its proper divisors (27257820018).

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

21200526606 is a wasteful number, since it uses less digits than its factorization.

21200526606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504774455.

The product of its (nonzero) digits is 8640, while the sum is 30.

The spelling of 21200526606 in words is "twenty-one billion, two hundred million, five hundred twenty-six thousand, six hundred six".