19950744646 has 24 divisors (see below), whose sum is σ = 35006524920. Its totient is φ = 8502544512.

The previous prime is 19950744577. The next prime is 19950744647. The reversal of 19950744646 is 64644705991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19950744647) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 551115 + ... + 586198.

It is an arithmetic number, because the mean of its divisors is an integer number (1458605205).

Almost surely, 2^19950744646 is an apocalyptic number.

19950744646 is a deficient number, since it is larger than the sum of its proper divisors (15055780274).

19950744646 is a wasteful number, since it uses less digits than its factorization.

19950744646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1137508 (or 1137501 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 55.

The spelling of 19950744646 in words is "nineteen billion, nine hundred fifty million, seven hundred forty-four thousand, six hundred forty-six".