19891602950 has 48 divisors (see below), whose sum is σ = 37173152016. Its totient is φ = 7919155200.

The previous prime is 19891602919. The next prime is 19891603073. The reversal of 19891602950 is 5920619891.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18231905 + ... + 18232995.

It is an arithmetic number, because the mean of its divisors is an integer number (774440667).

Almost surely, 2^19891602950 is an apocalyptic number.

19891602950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19891602950 is a deficient number, since it is larger than the sum of its proper divisors (17281549066).

19891602950 is a wasteful number, since it uses less digits than its factorization.

19891602950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2489 (or 2484 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 50.

The spelling of 19891602950 in words is "nineteen billion, eight hundred ninety-one million, six hundred two thousand, nine hundred fifty".