21034332402423 has 16 divisors (see below), whose sum is σ = 28319720232960. Its totient is φ = 13885932330144.

The previous prime is 21034332402331. The next prime is 21034332402451. The reversal of 21034332402423 is 32420423343012.

It is a de Polignac number, because none of the positive numbers 2^k-21034332402423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21034332402463) 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, 3331290 + ... + 7291512.

It is an arithmetic number, because the mean of its divisors is an integer number (1769982514560).

Almost surely, 2^{21034332402423} is an apocalyptic number.

21034332402423 is a deficient number, since it is larger than the sum of its proper divisors (7285387830537).

21034332402423 is a wasteful number, since it uses less digits than its factorization.

21034332402423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3977518.

The product of its (nonzero) digits is 82944, while the sum is 33.

Adding to 21034332402423 its reverse (32420423343012), we get a palindrome (53454755745435).

The spelling of 21034332402423 in words is "twenty-one trillion, thirty-four billion, three hundred thirty-two million, four hundred two thousand, four hundred twenty-three".