19898450632 has 32 divisors (see below), whose sum is σ = 39582950400. Its totient is φ = 9345328384.

The previous prime is 19898450629. The next prime is 19898450641. The reversal of 19898450632 is 23605489891.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77032 + ... + 213847.

It is an arithmetic number, because the mean of its divisors is an integer number (1236967200).

Almost surely, 2^19898450632 is an apocalyptic number.

It is an amenable number.

19898450632 is a deficient number, since it is larger than the sum of its proper divisors (19684499768).

19898450632 is a wasteful number, since it uses less digits than its factorization.

19898450632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291405 (or 291401 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 55.

The spelling of 19898450632 in words is "nineteen billion, eight hundred ninety-eight million, four hundred fifty thousand, six hundred thirty-two".