21402357300 has 72 divisors (see below), whose sum is σ = 68804624000. Its totient is φ = 5707294560.

The previous prime is 21402357289. The next prime is 21402357307. The reversal of 21402357300 is 375320412.

21402357300 is a `hidden beast` number, since 2 + 1 + 4 + 0 + 2 + 357 + 300 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21402357307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3960700 + ... + 3966099.

Almost surely, 2^21402357300 is an apocalyptic number.

21402357300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21402357300 is an abundant number, since it is smaller than the sum of its proper divisors (47402266700).

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

21402357300 is a wasteful number, since it uses less digits than its factorization.

21402357300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7926822 (or 7926809 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

Adding to 21402357300 its reverse (375320412), we get a palindrome (21777677712).

The spelling of 21402357300 in words is "twenty-one billion, four hundred two million, three hundred fifty-seven thousand, three hundred".