21746812983 has 16 divisors (see below), whose sum is σ = 33170489856. Its totient is φ = 12414566880.

The previous prime is 21746812963. The next prime is 21746813017. The reversal of 21746812983 is 38921864712.

It is a happy number.

It is not a de Polignac number, because 21746812983 - 2¹² = 21746808887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21746812963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 485691 + ... + 528572.

It is an arithmetic number, because the mean of its divisors is an integer number (2073155616).

Almost surely, 2^21746812983 is an apocalyptic number.

21746812983 is a deficient number, since it is larger than the sum of its proper divisors (11423676873).

21746812983 is a wasteful number, since it uses less digits than its factorization.

21746812983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1015294.

The product of its digits is 1161216, while the sum is 51.

The spelling of 21746812983 in words is "twenty-one billion, seven hundred forty-six million, eight hundred twelve thousand, nine hundred eighty-three".