19772880739 has 2 divisors, whose sum is σ = 19772880740. Its totient is φ = 19772880738.

The previous prime is 19772880737. The next prime is 19772880749. The reversal of 19772880739 is 93708827791.

It is a weak prime.

It is an emirp because it is prime and its reverse (93708827791) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19772880739 - 2¹ = 19772880737 is a prime.

It is a super-2 number, since 2×19772880739² (a number of 21 digits) contains 22 as substring.

Together with 19772880737, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (19772880733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9886440369 + 9886440370.

It is an arithmetic number, because the mean of its divisors is an integer number (9886440370).

Almost surely, 2^19772880739 is an apocalyptic number.

19772880739 is a deficient number, since it is larger than the sum of its proper divisors (1).

19772880739 is an equidigital number, since it uses as much as digits as its factorization.

19772880739 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10668672, while the sum is 61.

The spelling of 19772880739 in words is "nineteen billion, seven hundred seventy-two million, eight hundred eighty thousand, seven hundred thirty-nine".