19220487973 has 2 divisors, whose sum is σ = 19220487974. Its totient is φ = 19220487972.

The previous prime is 19220487893. The next prime is 19220488057. The reversal of 19220487973 is 37978402291.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10420734724 + 8799753249 = 102082^2 + 93807^2 .

It is a cyclic number.

It is not a de Polignac number, because 19220487973 - 2¹⁷ = 19220356901 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19220487973.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19220487173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9610243986 + 9610243987.

It is an arithmetic number, because the mean of its divisors is an integer number (9610243987).

Almost surely, 2^19220487973 is an apocalyptic number.

It is an amenable number.

19220487973 is a deficient number, since it is larger than the sum of its proper divisors (1).

19220487973 is an equidigital number, since it uses as much as digits as its factorization.

19220487973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1524096, while the sum is 52.

The spelling of 19220487973 in words is "nineteen billion, two hundred twenty million, four hundred eighty-seven thousand, nine hundred seventy-three".