19213908850 has 12 divisors (see below), whose sum is σ = 35737870554. Its totient is φ = 7685563520.

The previous prime is 19213908829. The next prime is 19213908851. The reversal of 19213908850 is 5880931291.

It can be written as a sum of positive squares in 3 ways, for example, as 15075173961 + 4138734889 = 122781^2 + 64333^2 .

It is a super-2 number, since 2×19213908850² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19213908850.

It is not an unprimeable number, because it can be changed into a prime (19213908851) 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, 192139039 + ... + 192139138.

Almost surely, 2^19213908850 is an apocalyptic number.

19213908850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19213908850 is a deficient number, since it is larger than the sum of its proper divisors (16523961704).

19213908850 is a wasteful number, since it uses less digits than its factorization.

19213908850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384278189 (or 384278184 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 46.

The spelling of 19213908850 in words is "nineteen billion, two hundred thirteen million, nine hundred eight thousand, eight hundred fifty".