21836446707 has 4 divisors (see below), whose sum is σ = 29115262280. Its totient is φ = 14557631136.

The previous prime is 21836446699. The next prime is 21836446727. The reversal of 21836446707 is 70764463812.

It is a happy number.

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

It is not a de Polignac number, because 21836446707 - 2³ = 21836446699 is a prime.

It is a super-2 number, since 2×21836446707² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21836446727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3639407782 + ... + 3639407787.

It is an arithmetic number, because the mean of its divisors is an integer number (7278815570).

Almost surely, 2^21836446707 is an apocalyptic number.

21836446707 is a deficient number, since it is larger than the sum of its proper divisors (7278815573).

21836446707 is an equidigital number, since it uses as much as digits as its factorization.

21836446707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7278815572.

The product of its (nonzero) digits is 1354752, while the sum is 48.

The spelling of 21836446707 in words is "twenty-one billion, eight hundred thirty-six million, four hundred forty-six thousand, seven hundred seven".