21303500401388 has 48 divisors (see below), whose sum is σ = 37854538444800. Its totient is φ = 10488310176960.

The previous prime is 21303500401387. The next prime is 21303500401411. The reversal of 21303500401388 is 88310400530312.

It is a super-2 number, since 2×21303500401388² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21303500401387) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 775025381 + ... + 775052867.

It is an arithmetic number, because the mean of its divisors is an integer number (788636217600).

Almost surely, 2^{21303500401388} is an apocalyptic number.

It is an amenable number.

21303500401388 is a deficient number, since it is larger than the sum of its proper divisors (16551038043412).

21303500401388 is a wasteful number, since it uses less digits than its factorization.

21303500401388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30950 (or 30948 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 38.

The spelling of 21303500401388 in words is "twenty-one trillion, three hundred three billion, five hundred million, four hundred one thousand, three hundred eighty-eight".