19900759747 has 4 divisors (see below), whose sum is σ = 21709919736. Its totient is φ = 18091599760.

The previous prime is 19900759717. The next prime is 19900759817. The reversal of 19900759747 is 74795700991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74795700991 = 11 ⋅6799609181.

It is a cyclic number.

It is not a de Polignac number, because 19900759747 - 2²³ = 19892371139 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19900759691 and 19900759700.

It is not an unprimeable number, because it can be changed into a prime (19900759717) 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, 904579978 + ... + 904579999.

It is an arithmetic number, because the mean of its divisors is an integer number (5427479934).

Almost surely, 2^19900759747 is an apocalyptic number.

19900759747 is a deficient number, since it is larger than the sum of its proper divisors (1809159989).

19900759747 is a wasteful number, since it uses less digits than its factorization.

19900759747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1809159988.

The product of its (nonzero) digits is 5000940, while the sum is 58.

The spelling of 19900759747 in words is "nineteen billion, nine hundred million, seven hundred fifty-nine thousand, seven hundred forty-seven".