21400135433 has 8 divisors (see below), whose sum is σ = 22363772928. Its totient is φ = 20439264384.

The previous prime is 21400135411. The next prime is 21400135439. The reversal of 21400135433 is 33453100412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21400135433 - 2¹⁰ = 21400134409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21400135439) 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 7 ways as a sum of consecutive naturals, for example, 675785 + ... + 706742.

It is an arithmetic number, because the mean of its divisors is an integer number (2795471616).

Almost surely, 2^21400135433 is an apocalyptic number.

21400135433 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21400135433 is a deficient number, since it is larger than the sum of its proper divisors (963637495).

21400135433 is a wasteful number, since it uses less digits than its factorization.

21400135433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1383223.

The product of its (nonzero) digits is 4320, while the sum is 26.

Adding to 21400135433 its reverse (33453100412), we get a palindrome (54853235845).

The spelling of 21400135433 in words is "twenty-one billion, four hundred million, one hundred thirty-five thousand, four hundred thirty-three".