19742621035 has 16 divisors (see below), whose sum is σ = 24035942592. Its totient is φ = 15564438400.

The previous prime is 19742621011. The next prime is 19742621053. The reversal of 19742621035 is 53012624791.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-19742621035 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 833577 + ... + 856933.

It is an arithmetic number, because the mean of its divisors is an integer number (1502246412).

Almost surely, 2^19742621035 is an apocalyptic number.

19742621035 is a deficient number, since it is larger than the sum of its proper divisors (4293321557).

19742621035 is a wasteful number, since it uses less digits than its factorization.

19742621035 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25814.

The product of its (nonzero) digits is 90720, while the sum is 40.

The spelling of 19742621035 in words is "nineteen billion, seven hundred forty-two million, six hundred twenty-one thousand, thirty-five".