21403134443124 has 72 divisors (see below), whose sum is σ = 61848031871808. Its totient is φ = 6113524222080.

The previous prime is 21403134443087. The next prime is 21403134443129. The reversal of 21403134443124 is 42134443130412.

21403134443124 is a `hidden beast` number, since 2 + 140 + 31 + 34 + 4 + 431 + 24 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21403134443129) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10575297 + ... + 12435560.

It is an arithmetic number, because the mean of its divisors is an integer number (859000442664).

Almost surely, 2^{21403134443124} is an apocalyptic number.

It is an amenable number.

21403134443124 is an abundant number, since it is smaller than the sum of its proper divisors (40444897428684).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21403134443124 is a wasteful number, since it uses less digits than its factorization.

21403134443124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23014565 (or 23014560 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 36.

Adding to 21403134443124 its reverse (42134443130412), we get a palindrome (63537577573536).

The spelling of 21403134443124 in words is "twenty-one trillion, four hundred three billion, one hundred thirty-four million, four hundred forty-three thousand, one hundred twenty-four".