21400050030 has 16 divisors (see below), whose sum is σ = 51360120144. Its totient is φ = 5706680000.

The previous prime is 21400050019. The next prime is 21400050031. The reversal of 21400050030 is 3005000412.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21400049991 and 21400050009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21400050031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 356667471 + ... + 356667530.

It is an arithmetic number, because the mean of its divisors is an integer number (3210007509).

Almost surely, 2^21400050030 is an apocalyptic number.

21400050030 is an abundant number, since it is smaller than the sum of its proper divisors (29960070114).

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

21400050030 is a wasteful number, since it uses less digits than its factorization.

21400050030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713335011.

The product of its (nonzero) digits is 120, while the sum is 15.

Adding to 21400050030 its reverse (3005000412), we get a palindrome (24405050442).

The spelling of 21400050030 in words is "twenty-one billion, four hundred million, fifty thousand, thirty".