21302011400 has 48 divisors (see below), whose sum is σ = 49762001040. Its totient is φ = 8480404800.

The previous prime is 21302011399. The next prime is 21302011403. The reversal of 21302011400 is 411020312.

It is not an unprimeable number, because it can be changed into a prime (21302011403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 210194 + ... + 294593.

It is an arithmetic number, because the mean of its divisors is an integer number (1036708355).

Almost surely, 2^21302011400 is an apocalyptic number.

21302011400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21302011400 is an abundant number, since it is smaller than the sum of its proper divisors (28459989640).

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

21302011400 is a wasteful number, since it uses less digits than its factorization.

21302011400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505014 (or 505005 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21302011400 its reverse (411020312), we get a palindrome (21713031712).

The spelling of 21302011400 in words is "twenty-one billion, three hundred two million, eleven thousand, four hundred".