21403433342340 has 192 divisors, whose sum is σ = 76103279616000. Its totient is φ = 4892072982912.

The previous prime is 21403433342299. The next prime is 21403433342363. The reversal of 21403433342340 is 4324333430412.

21403433342340 is a `hidden beast` number, since 2 + 140 + 3 + 433 + 3 + 42 + 3 + 40 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 21403433342295 and 21403433342304.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 191389761 + ... + 191501559.

It is an arithmetic number, because the mean of its divisors is an integer number (396371248000).

Almost surely, 2^{21403433342340} is an apocalyptic number.

21403433342340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21403433342340 is an abundant number, since it is smaller than the sum of its proper divisors (54699846273660).

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

21403433342340 is a wasteful number, since it uses less digits than its factorization.

21403433342340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162471 (or 162463 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 36.

Adding to 21403433342340 its reverse (4324333430412), we get a palindrome (25727766772752).

The spelling of 21403433342340 in words is "twenty-one trillion, four hundred three billion, four hundred thirty-three million, three hundred forty-two thousand, three hundred forty".