21226051730 has 64 divisors (see below), whose sum is σ = 42192057600. Its totient is φ = 7638817536.

The previous prime is 21226051711. The next prime is 21226051741. The reversal of 21226051730 is 3715062212.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21226051693 and 21226051702.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2807996 + ... + 2815544.

It is an arithmetic number, because the mean of its divisors is an integer number (659250900).

Almost surely, 2^21226051730 is an apocalyptic number.

21226051730 is a deficient number, since it is larger than the sum of its proper divisors (20966005870).

21226051730 is a wasteful number, since it uses less digits than its factorization.

21226051730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8115.

The product of its (nonzero) digits is 5040, while the sum is 29.

The spelling of 21226051730 in words is "twenty-one billion, two hundred twenty-six million, fifty-one thousand, seven hundred thirty".