21396082486 has 4 divisors (see below), whose sum is σ = 32094123732. Its totient is φ = 10698041242.

The previous prime is 21396082471. The next prime is 21396082493. The reversal of 21396082486 is 68428069312.

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

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, 5349020620 + ... + 5349020623.

It is an arithmetic number, because the mean of its divisors is an integer number (8023530933).

Almost surely, 2^21396082486 is an apocalyptic number.

21396082486 is a deficient number, since it is larger than the sum of its proper divisors (10698041246).

21396082486 is a wasteful number, since it uses less digits than its factorization.

21396082486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10698041245.

The product of its (nonzero) digits is 995328, while the sum is 49.

The spelling of 21396082486 in words is "twenty-one billion, three hundred ninety-six million, eighty-two thousand, four hundred eighty-six".