19277997953 has 2 divisors, whose sum is σ = 19277997954. Its totient is φ = 19277997952.

The previous prime is 19277997941. The next prime is 19277998039. The reversal of 19277997953 is 35979977291.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12725419249 + 6552578704 = 112807^2 + 80948^2 .

It is a cyclic number.

It is not a de Polignac number, because 19277997953 - 2⁶ = 19277997889 is a prime.

It is not a weakly prime, because it can be changed into another prime (19277997923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9638998976 + 9638998977.

It is an arithmetic number, because the mean of its divisors is an integer number (9638998977).

Almost surely, 2^19277997953 is an apocalyptic number.

It is an amenable number.

19277997953 is a deficient number, since it is larger than the sum of its proper divisors (1).

19277997953 is an equidigital number, since it uses as much as digits as its factorization.

19277997953 is an evil number, because the sum of its binary digits is even.

The product of its digits is 67512690, while the sum is 68.

The spelling of 19277997953 in words is "nineteen billion, two hundred seventy-seven million, nine hundred ninety-seven thousand, nine hundred fifty-three".