21400433134 has 16 divisors (see below), whose sum is σ = 34138515600. Its totient is φ = 10032539904.

The previous prime is 21400433063. The next prime is 21400433137. The reversal of 21400433134 is 43133400412.

It is a junction number, because it is equal to n+sod(n) for n = 21400433099 and 21400433108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21400433137) 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, 2899249 + ... + 2906620.

It is an arithmetic number, because the mean of its divisors is an integer number (2133657225).

Almost surely, 2^21400433134 is an apocalyptic number.

21400433134 is a deficient number, since it is larger than the sum of its proper divisors (12738082466).

21400433134 is a wasteful number, since it uses less digits than its factorization.

21400433134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5805987.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 21400433134 its reverse (43133400412), we get a palindrome (64533833546).

The spelling of 21400433134 in words is "twenty-one billion, four hundred million, four hundred thirty-three thousand, one hundred thirty-four".