21346125426 has 16 divisors (see below), whose sum is σ = 47435834400. Its totient is φ = 7115375124.

The previous prime is 21346125413. The next prime is 21346125461. The reversal of 21346125426 is 62452164312.

21346125426 is a `hidden beast` number, since 2 + 1 + 34 + 612 + 5 + 4 + 2 + 6 = 666.

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, 197649256 + ... + 197649363.

It is an arithmetic number, because the mean of its divisors is an integer number (2964739650).

Almost surely, 2^21346125426 is an apocalyptic number.

21346125426 is an abundant number, since it is smaller than the sum of its proper divisors (26089708974).

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

21346125426 is a wasteful number, since it uses less digits than its factorization.

21346125426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395298630 (or 395298624 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

Adding to 21346125426 its reverse (62452164312), we get a palindrome (83798289738).

The spelling of 21346125426 in words is "twenty-one billion, three hundred forty-six million, one hundred twenty-five thousand, four hundred twenty-six".