19494947750 has 32 divisors (see below), whose sum is σ = 36506706912. Its totient is φ = 7795380000.

The previous prime is 19494947749. The next prime is 19494947807. The reversal of 19494947750 is 5774949491.

It is a self number, because there is not a number n which added to its sum of digits gives 19494947750.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 853985 + ... + 876515.

It is an arithmetic number, because the mean of its divisors is an integer number (1140834591).

Almost surely, 2^19494947750 is an apocalyptic number.

19494947750 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19494947750 is a deficient number, since it is larger than the sum of its proper divisors (17011759162).

19494947750 is a wasteful number, since it uses less digits than its factorization.

19494947750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26009 (or 25999 counting only the distinct ones).

The product of its (nonzero) digits is 11430720, while the sum is 59.

The spelling of 19494947750 in words is "nineteen billion, four hundred ninety-four million, nine hundred forty-seven thousand, seven hundred fifty".