19503914074 has 4 divisors (see below), whose sum is σ = 29255871114. Its totient is φ = 9751957036.

The previous prime is 19503914041. The next prime is 19503914077. The reversal of 19503914074 is 47041930591.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 16400644225 + 3103269849 = 128065^2 + 55707^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 19503914074.

It is not an unprimeable number, because it can be changed into a prime (19503914077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4875978517 + ... + 4875978520.

Almost surely, 2^19503914074 is an apocalyptic number.

19503914074 is a deficient number, since it is larger than the sum of its proper divisors (9751957040).

19503914074 is an equidigital number, since it uses as much as digits as its factorization.

19503914074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9751957039.

The product of its (nonzero) digits is 136080, while the sum is 43.

The spelling of 19503914074 in words is "nineteen billion, five hundred three million, nine hundred fourteen thousand, seventy-four".