19473923401 has 9 divisors (see below), whose sum is σ = 19855829749. Its totient is φ = 19099234336.

The previous prime is 19473923393. The next prime is 19473923461. The reversal of 19473923401 is 10432937491.

The square root of 19473923401 is 139549.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 380211001 + 19093712400 = 19499^2 + 138180^2 .

It is not a de Polignac number, because 19473923401 - 2³ = 19473923393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19473923461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 7394781 + ... + 7397413.

Almost surely, 2^19473923401 is an apocalyptic number.

19473923401 is the 139549-th square number.

19473923401 is the 69775-th centered octagonal number.

It is an amenable number.

19473923401 is a deficient number, since it is larger than the sum of its proper divisors (381906348).

19473923401 is an frugal number, since it uses more digits than its factorization.

19473923401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5372 (or 2686 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 43.

The spelling of 19473923401 in words is "nineteen billion, four hundred seventy-three million, nine hundred twenty-three thousand, four hundred one".