21403132040323 has 12 divisors (see below), whose sum is σ = 23572902577000. Its totient is φ = 19418399938080.

The previous prime is 21403132040267. The next prime is 21403132040347. The reversal of 21403132040323 is 32304023130412.

It is a happy number.

It is not a de Polignac number, because 21403132040323 - 2²¹ = 21403129943171 is a prime.

It is a super-2 number, since 2×21403132040323² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21403132040291 and 21403132040300.

It is not an unprimeable number, because it can be changed into a prime (21403132040393) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 177179490 + ... + 177300247.

Almost surely, 2^{21403132040323} is an apocalyptic number.

21403132040323 is a deficient number, since it is larger than the sum of its proper divisors (2169770536677).

21403132040323 is a wasteful number, since it uses less digits than its factorization.

21403132040323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354480258 (or 354480247 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 28.

Adding to 21403132040323 its reverse (32304023130412), we get a palindrome (53707155170735).

The spelling of 21403132040323 in words is "twenty-one trillion, four hundred three billion, one hundred thirty-two million, forty thousand, three hundred twenty-three".