19780742626 has 8 divisors (see below), whose sum is σ = 29672959680. Its totient is φ = 9889756068.

The previous prime is 19780742599. The next prime is 19780742659. The reversal of 19780742626 is 62624708791.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 266326 + ... + 332401.

It is an arithmetic number, because the mean of its divisors is an integer number (3709119960).

Almost surely, 2^19780742626 is an apocalyptic number.

19780742626 is a deficient number, since it is larger than the sum of its proper divisors (9892217054).

19780742626 is a wasteful number, since it uses less digits than its factorization.

19780742626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615248.

The product of its (nonzero) digits is 2032128, while the sum is 52.

The spelling of 19780742626 in words is "nineteen billion, seven hundred eighty million, seven hundred forty-two thousand, six hundred twenty-six".