19898648023 has 2 divisors, whose sum is σ = 19898648024. Its totient is φ = 19898648022.

The previous prime is 19898647981. The next prime is 19898648057. The reversal of 19898648023 is 32084689891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19898648023 - 2²¹ = 19896550871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19898648423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9949324011 + 9949324012.

It is an arithmetic number, because the mean of its divisors is an integer number (9949324012).

Almost surely, 2^19898648023 is an apocalyptic number.

19898648023 is a deficient number, since it is larger than the sum of its proper divisors (1).

19898648023 is an equidigital number, since it uses as much as digits as its factorization.

19898648023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5971968, while the sum is 58.

It can be divided in two parts, 198986 and 48023, that added together give a square (247009 = 497²).

The spelling of 19898648023 in words is "nineteen billion, eight hundred ninety-eight million, six hundred forty-eight thousand, twenty-three".