21052582206 has 16 divisors (see below), whose sum is σ = 42513953664. Its totient is φ = 6949395864.

The previous prime is 21052582153. The next prime is 21052582211. The reversal of 21052582206 is 60228525012.

It is a happy number.

It is a super-2 number, since 2×21052582206² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17032216 + ... + 17033451.

It is an arithmetic number, because the mean of its divisors is an integer number (2657122104).

Almost surely, 2^21052582206 is an apocalyptic number.

21052582206 is an abundant number, since it is smaller than the sum of its proper divisors (21461371458).

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

21052582206 is a wasteful number, since it uses less digits than its factorization.

21052582206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34065775.

The product of its (nonzero) digits is 19200, while the sum is 33.

The spelling of 21052582206 in words is "twenty-one billion, fifty-two million, five hundred eighty-two thousand, two hundred six".