21000020270352 has 40 divisors (see below), whose sum is σ = 54250310168640. Its totient is φ = 6999973491840.

The previous prime is 21000020270329. The next prime is 21000020270353. The reversal of 21000020270352 is 25307202000012.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (21000020270353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10483149 + ... + 12324627.

It is an arithmetic number, because the mean of its divisors is an integer number (1356257754216).

Almost surely, 2^{21000020270352} is an apocalyptic number.

It is an amenable number.

21000020270352 is an abundant number, since it is smaller than the sum of its proper divisors (33250289898288).

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

21000020270352 is a wasteful number, since it uses less digits than its factorization.

21000020270352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2079071 (or 2079065 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 24.

Adding to 21000020270352 its reverse (25307202000012), we get a palindrome (46307222270364).

The spelling of 21000020270352 in words is "twenty-one trillion, twenty million, two hundred seventy thousand, three hundred fifty-two".