19772741773 has 4 divisors (see below), whose sum is σ = 19790866368. Its totient is φ = 19754617180.

The previous prime is 19772741741. The next prime is 19772741777. The reversal of 19772741773 is 37714727791.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 37714727791 = 13 ⋅2901132907.

It is a cyclic number.

It is not a de Polignac number, because 19772741773 - 2⁵ = 19772741741 is a prime.

It is a super-2 number, since 2×19772741773² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19772741777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9060661 + ... + 9062842.

It is an arithmetic number, because the mean of its divisors is an integer number (4947716592).

Almost surely, 2^19772741773 is an apocalyptic number.

It is an amenable number.

19772741773 is a deficient number, since it is larger than the sum of its proper divisors (18124595).

19772741773 is a wasteful number, since it uses less digits than its factorization.

19772741773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18124594.

The product of its digits is 3630312, while the sum is 55.

The spelling of 19772741773 in words is "nineteen billion, seven hundred seventy-two million, seven hundred forty-one thousand, seven hundred seventy-three".