21396083076 has 27 divisors (see below), whose sum is σ = 54086761911. Its totient is φ = 7131735144.

The previous prime is 21396083011. The next prime is 21396083083. The reversal of 21396083076 is 67038069312.

The square root of 21396083076 is 146274.

It is a perfect power (a square), and thus also a powerful number.

21396083076 is a `hidden beast` number, since 2 + 1 + 3 + 9 + 608 + 30 + 7 + 6 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 865455 + ... + 889833.

Almost surely, 2^21396083076 is an apocalyptic number.

21396083076 is the 146274-th square number.

It is an amenable number.

21396083076 is an abundant number, since it is smaller than the sum of its proper divisors (32690678835).

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

21396083076 is an frugal number, since it uses more digits than its factorization.

21396083076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48768 (or 24384 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The spelling of 21396083076 in words is "twenty-one billion, three hundred ninety-six million, eighty-three thousand, seventy-six".