21267072350 has 12 divisors (see below), whose sum is σ = 39556754664. Its totient is φ = 8506828920.

The previous prime is 21267072349. The next prime is 21267072353. The reversal of 21267072350 is 5327076212.

It is a self number, because there is not a number n which added to its sum of digits gives 21267072350.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21267072353) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 212670674 + ... + 212670773.

It is an arithmetic number, because the mean of its divisors is an integer number (3296396222).

Almost surely, 2^21267072350 is an apocalyptic number.

21267072350 is a deficient number, since it is larger than the sum of its proper divisors (18289682314).

21267072350 is a wasteful number, since it uses less digits than its factorization.

21267072350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425341459 (or 425341454 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 35.

The spelling of 21267072350 in words is "twenty-one billion, two hundred sixty-seven million, seventy-two thousand, three hundred fifty".