19900000553 has 2 divisors, whose sum is σ = 19900000554. Its totient is φ = 19900000552.

The previous prime is 19900000543. The next prime is 19900000619. The reversal of 19900000553 is 35500000991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17852166544 + 2047834009 = 133612^2 + 45253^2 .

It is a cyclic number.

It is not a de Polignac number, because 19900000553 - 2⁸ = 19900000297 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (19900000543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9950000276 + 9950000277.

It is an arithmetic number, because the mean of its divisors is an integer number (9950000277).

Almost surely, 2^19900000553 is an apocalyptic number.

It is an amenable number.

19900000553 is a deficient number, since it is larger than the sum of its proper divisors (1).

19900000553 is an equidigital number, since it uses as much as digits as its factorization.

19900000553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6075, while the sum is 32.

The spelling of 19900000553 in words is "nineteen billion, nine hundred million, five hundred fifty-three", and thus it is an aban number.