21082621214 has 4 divisors (see below), whose sum is σ = 31623931824. Its totient is φ = 10541310606.

The previous prime is 21082621207. The next prime is 21082621277. The reversal of 21082621214 is 41212628012.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5270655302 + ... + 5270655305.

It is an arithmetic number, because the mean of its divisors is an integer number (7905982956).

Almost surely, 2^21082621214 is an apocalyptic number.

21082621214 is a deficient number, since it is larger than the sum of its proper divisors (10541310610).

21082621214 is a wasteful number, since it uses less digits than its factorization.

21082621214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10541310609.

The product of its (nonzero) digits is 3072, while the sum is 29.

The spelling of 21082621214 in words is "twenty-one billion, eighty-two million, six hundred twenty-one thousand, two hundred fourteen".