19838825077 has 2 divisors, whose sum is σ = 19838825078. Its totient is φ = 19838825076.

The previous prime is 19838825063. The next prime is 19838825113. The reversal of 19838825077 is 77052883891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18246336241 + 1592488836 = 135079^2 + 39906^2 .

It is a cyclic number.

It is not a de Polignac number, because 19838825077 - 2⁷ = 19838824949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19838820077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9919412538 + 9919412539.

It is an arithmetic number, because the mean of its divisors is an integer number (9919412539).

Almost surely, 2^19838825077 is an apocalyptic number.

It is an amenable number.

19838825077 is a deficient number, since it is larger than the sum of its proper divisors (1).

19838825077 is an equidigital number, since it uses as much as digits as its factorization.

19838825077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6773760, while the sum is 58.

The spelling of 19838825077 in words is "nineteen billion, eight hundred thirty-eight million, eight hundred twenty-five thousand, seventy-seven".