21403132040291 has 8 divisors (see below), whose sum is σ = 21674143518720. Its totient is φ = 21132122705928.

The previous prime is 21403132040267. The next prime is 21403132040347. The reversal of 21403132040291 is 19204023130412.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21403132040291 is a prime.

It is a super-4 number, since 4×21403132040291⁴ (a number of 54 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21403132045291) 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, 31910120 + ... + 32573946.

It is an arithmetic number, because the mean of its divisors is an integer number (2709267939840).

Almost surely, 2^{21403132040291} is an apocalyptic number.

21403132040291 is a deficient number, since it is larger than the sum of its proper divisors (271011478429).

21403132040291 is an equidigital number, since it uses as much as digits as its factorization.

21403132040291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1072033.

The product of its (nonzero) digits is 10368, while the sum is 32.

The spelling of 21403132040291 in words is "twenty-one trillion, four hundred three billion, one hundred thirty-two million, forty thousand, two hundred ninety-one".