19770791039 has 4 divisors (see below), whose sum is σ = 19921713240. Its totient is φ = 19619868840.

The previous prime is 19770791023. The next prime is 19770791083. The reversal of 19770791039 is 93019707791.

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

It is a cyclic number.

It is not a de Polignac number, because 19770791039 - 2⁴ = 19770791023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19770791239) 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, 75460904 + ... + 75461165.

It is an arithmetic number, because the mean of its divisors is an integer number (4980428310).

Almost surely, 2^19770791039 is an apocalyptic number.

19770791039 is a deficient number, since it is larger than the sum of its proper divisors (150922201).

19770791039 is a wasteful number, since it uses less digits than its factorization.

19770791039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150922200.

The product of its (nonzero) digits is 750141, while the sum is 53.

The spelling of 19770791039 in words is "nineteen billion, seven hundred seventy million, seven hundred ninety-one thousand, thirty-nine".