21401400414423 has 4 divisors (see below), whose sum is σ = 28535200552568. Its totient is φ = 14267600276280.

The previous prime is 21401400414403. The next prime is 21401400414467. The reversal of 21401400414423 is 32441400410412.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 21401400414423 - 2¹³ = 21401400406231 is a prime.

It is a super-2 number, since 2×21401400414423² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21401400414403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3566900069068 + ... + 3566900069073.

It is an arithmetic number, because the mean of its divisors is an integer number (7133800138142).

Almost surely, 2^{21401400414423} is an apocalyptic number.

21401400414423 is a deficient number, since it is larger than the sum of its proper divisors (7133800138145).

21401400414423 is an equidigital number, since it uses as much as digits as its factorization.

21401400414423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7133800138144.

The product of its (nonzero) digits is 12288, while the sum is 30.

Adding to 21401400414423 its reverse (32441400410412), we get a palindrome (53842800824835).

The spelling of 21401400414423 in words is "twenty-one trillion, four hundred one billion, four hundred million, four hundred fourteen thousand, four hundred twenty-three".