21114020432420 has 24 divisors (see below), whose sum is σ = 44731827363384. Its totient is φ = 8370868276736.

The previous prime is 21114020432411. The next prime is 21114020432437. The reversal of 21114020432420 is 2423402041112.

It can be written as a sum of positive squares in 4 ways, for example, as 2172393001216 + 18941627431204 = 1473904^2 + 4352198^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21114020432420.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4671241199 + ... + 4671245718.

It is an arithmetic number, because the mean of its divisors is an integer number (1863826140141).

Almost surely, 2^{21114020432420} is an apocalyptic number.

21114020432420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21114020432420 is an abundant number, since it is smaller than the sum of its proper divisors (23617806930964).

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

21114020432420 is a wasteful number, since it uses less digits than its factorization.

21114020432420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9342487039 (or 9342487037 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 21114020432420 its reverse (2423402041112), we get a palindrome (23537422473532).

The spelling of 21114020432420 in words is "twenty-one trillion, one hundred fourteen billion, twenty million, four hundred thirty-two thousand, four hundred twenty".