21403422043 has 8 divisors (see below), whose sum is σ = 23053870400. Its totient is φ = 19805368968.

The previous prime is 21403421993. The next prime is 21403422049. The reversal of 21403422043 is 34022430412.

It is a happy number.

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

It is not a de Polignac number, because 21403422043 - 2²¹ = 21401324891 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21403421999 and 21403422017.

It is not an unprimeable number, because it can be changed into a prime (21403422049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13097973 + ... + 13099606.

It is an arithmetic number, because the mean of its divisors is an integer number (2881733800).

Almost surely, 2^21403422043 is an apocalyptic number.

21403422043 is a deficient number, since it is larger than the sum of its proper divisors (1650448357).

21403422043 is a wasteful number, since it uses less digits than its factorization.

21403422043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26197641.

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 21403422043 its reverse (34022430412), we get a palindrome (55425852455).

The spelling of 21403422043 in words is "twenty-one billion, four hundred three million, four hundred twenty-two thousand, forty-three".