19958022050 has 18 divisors (see below), whose sum is σ = 37123779153. Its totient is φ = 7982809240.

The previous prime is 19958022031. The next prime is 19958022059. The reversal of 19958022050 is 5022085991.

It can be written as a sum of positive squares in 2 ways, for example, as 19558861609 + 399160441 = 139853^2 + 19979^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=99895.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19958021989 and 19958022007.

It is not an unprimeable number, because it can be changed into a prime (19958022059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 988961 + ... + 1008939.

Almost surely, 2^19958022050 is an apocalyptic number.

19958022050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19958022050 is a deficient number, since it is larger than the sum of its proper divisors (17165757103).

19958022050 is an frugal number, since it uses more digits than its factorization.

19958022050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39970 (or 19986 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 41.

The spelling of 19958022050 in words is "nineteen billion, nine hundred fifty-eight million, twenty-two thousand, fifty".