15420473773 has 2 divisors, whose sum is σ = 15420473774. Its totient is φ = 15420473772.

The previous prime is 15420473759. The next prime is 15420473779. The reversal of 15420473773 is 37737402451.

15420473773 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11159387044 + 4261086729 = 105638^2 + 65277^2 .

It is a cyclic number.

It is not a de Polignac number, because 15420473773 - 2¹⁷ = 15420342701 is a prime.

It is a super-3 number, since 3×15420473773³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15420473779) 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 as a sum of consecutive naturals, namely, 7710236886 + 7710236887.

It is an arithmetic number, because the mean of its divisors is an integer number (7710236887).

Almost surely, 2^15420473773 is an apocalyptic number.

It is an amenable number.

15420473773 is a deficient number, since it is larger than the sum of its proper divisors (1).

15420473773 is an equidigital number, since it uses as much as digits as its factorization.

15420473773 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 493920, while the sum is 43.

The spelling of 15420473773 in words is "fifteen billion, four hundred twenty million, four hundred seventy-three thousand, seven hundred seventy-three".