21082634858 has 16 divisors (see below), whose sum is σ = 31669056000. Its totient is φ = 10526296512.

The previous prime is 21082634851. The next prime is 21082634879. The reversal of 21082634858 is 85843628012.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21082634851) 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, 7321463 + ... + 7324341.

It is an arithmetic number, because the mean of its divisors is an integer number (1979316000).

Almost surely, 2^21082634858 is an apocalyptic number.

21082634858 is a deficient number, since it is larger than the sum of its proper divisors (10586421142).

21082634858 is a wasteful number, since it uses less digits than its factorization.

21082634858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6829.

The product of its (nonzero) digits is 737280, while the sum is 47.

The spelling of 21082634858 in words is "twenty-one billion, eighty-two million, six hundred thirty-four thousand, eight hundred fifty-eight".