21400200435 has 16 divisors (see below), whose sum is σ = 34281743616. Its totient is φ = 11399632608.

The previous prime is 21400200433. The next prime is 21400200443. The reversal of 21400200435 is 53400200412.

It is not a de Polignac number, because 21400200435 - 2¹ = 21400200433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21400200433) 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, 850159 + ... + 874968.

It is an arithmetic number, because the mean of its divisors is an integer number (2142608976).

Almost surely, 2^21400200435 is an apocalyptic number.

21400200435 is a deficient number, since it is larger than the sum of its proper divisors (12881543181).

21400200435 is a wasteful number, since it uses less digits than its factorization.

21400200435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1725962.

The product of its (nonzero) digits is 960, while the sum is 21.

Adding to 21400200435 its reverse (53400200412), we get a palindrome (74800400847).

The spelling of 21400200435 in words is "twenty-one billion, four hundred million, two hundred thousand, four hundred thirty-five".