19621487446 has 16 divisors (see below), whose sum is σ = 32112596160. Its totient is φ = 8917550280.

The previous prime is 19621487441. The next prime is 19621487467. The reversal of 19621487446 is 64478412691.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 19621487393 and 19621487402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19621487441) 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 7 ways as a sum of consecutive naturals, for example, 97045 + ... + 220591.

It is an arithmetic number, because the mean of its divisors is an integer number (2007037260).

Almost surely, 2^19621487446 is an apocalyptic number.

19621487446 is a deficient number, since it is larger than the sum of its proper divisors (12491108714).

19621487446 is a wasteful number, since it uses less digits than its factorization.

19621487446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130779.

The product of its digits is 2322432, while the sum is 52.

The spelling of 19621487446 in words is "nineteen billion, six hundred twenty-one million, four hundred eighty-seven thousand, four hundred forty-six".