19736440426 has 32 divisors (see below), whose sum is σ = 30181277952. Its totient is φ = 9678251520.

The previous prime is 19736440387. The next prime is 19736440429. The reversal of 19736440426 is 62404463791.

It is a super-2 number, since 2×19736440426² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19736440429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13638835 + ... + 13640281.

It is an arithmetic number, because the mean of its divisors is an integer number (943164936).

Almost surely, 2^19736440426 is an apocalyptic number.

19736440426 is a deficient number, since it is larger than the sum of its proper divisors (10444837526).

19736440426 is a wasteful number, since it uses less digits than its factorization.

19736440426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2134.

The product of its (nonzero) digits is 870912, while the sum is 46.

The spelling of 19736440426 in words is "nineteen billion, seven hundred thirty-six million, four hundred forty thousand, four hundred twenty-six".