23320421636 has 12 divisors (see below), whose sum is σ = 43211369628. Its totient is φ = 10974316032.

The previous prime is 23320421623. The next prime is 23320421681. The reversal of 23320421636 is 63612402332.

It can be written as a sum of positive squares in 2 ways, for example, as 15976960000 + 7343461636 = 126400^2 + 85694^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 171473621 + ... + 171473756.

It is an arithmetic number, because the mean of its divisors is an integer number (3600947469).

Almost surely, 2^23320421636 is an apocalyptic number.

It is an amenable number.

23320421636 is a deficient number, since it is larger than the sum of its proper divisors (19890947992).

23320421636 is a wasteful number, since it uses less digits than its factorization.

23320421636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342947398 (or 342947396 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 32.

Adding to 23320421636 its reverse (63612402332), we get a palindrome (86932823968).

The spelling of 23320421636 in words is "twenty-three billion, three hundred twenty million, four hundred twenty-one thousand, six hundred thirty-six".