19742634026 has 8 divisors (see below), whose sum is σ = 29638288260. Its totient is φ = 9863204608.

The previous prime is 19742634017. The next prime is 19742634029. The reversal of 19742634026 is 62043624791.

It can be written as a sum of positive squares in 2 ways, for example, as 18591049801 + 1151584225 = 136349^2 + 33935^2 .

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

It is not an unprimeable number, because it can be changed into a prime (19742634029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4053161 + ... + 4058028.

Almost surely, 2^19742634026 is an apocalyptic number.

19742634026 is a deficient number, since it is larger than the sum of its proper divisors (9895654234).

19742634026 is a wasteful number, since it uses less digits than its factorization.

19742634026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8112408.

The product of its (nonzero) digits is 435456, while the sum is 44.

The spelling of 19742634026 in words is "nineteen billion, seven hundred forty-two million, six hundred thirty-four thousand, twenty-six".