21299892606 has 12 divisors (see below), whose sum is σ = 46149767352. Its totient is φ = 7099964196.

The previous prime is 21299892599. The next prime is 21299892643. The reversal of 21299892606 is 60629899212.

It is a happy number.

21299892606 is a `hidden beast` number, since 2 + 1 + 29 + 9 + 8 + 9 + 2 + 606 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 591663666 + ... + 591663701.

It is an arithmetic number, because the mean of its divisors is an integer number (3845813946).

Almost surely, 2^21299892606 is an apocalyptic number.

21299892606 is an abundant number, since it is smaller than the sum of its proper divisors (24849874746).

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

21299892606 is a wasteful number, since it uses less digits than its factorization.

21299892606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1183327375 (or 1183327372 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 54.

The spelling of 21299892606 in words is "twenty-one billion, two hundred ninety-nine million, eight hundred ninety-two thousand, six hundred six".