21475140352 has 36 divisors (see below), whose sum is σ = 43290865296. Its totient is φ = 10631244800.

The previous prime is 21475140343. The next prime is 21475140359. The reversal of 21475140352 is 25304157412.

It is a super-2 number, since 2×21475140352² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21475140359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 389428 + ... + 441139.

It is an arithmetic number, because the mean of its divisors is an integer number (1202524036).

Almost surely, 2^21475140352 is an apocalyptic number.

It is an amenable number.

21475140352 is an abundant number, since it is smaller than the sum of its proper divisors (21815724944).

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

21475140352 is an equidigital number, since it uses as much as digits as its factorization.

21475140352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 830684 (or 830670 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 34.

Adding to 21475140352 its reverse (25304157412), we get a palindrome (46779297764).

The spelling of 21475140352 in words is "twenty-one billion, four hundred seventy-five million, one hundred forty thousand, three hundred fifty-two".