19769786225 has 18 divisors (see below), whose sum is σ = 28516909734. Its totient is φ = 13556424000.

The previous prime is 19769786173. The next prime is 19769786249. The reversal of 19769786225 is 52268796791.

It can be written as a sum of positive squares in 3 ways, for example, as 4800481 + 19764985744 = 2191^2 + 140588^2 .

It is not a de Polignac number, because 19769786225 - 2⁶ = 19769786161 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 8068076 + ... + 8070525.

It is an arithmetic number, because the mean of its divisors is an integer number (1584272763).

Almost surely, 2^19769786225 is an apocalyptic number.

It is an amenable number.

19769786225 is a deficient number, since it is larger than the sum of its proper divisors (8747123509).

19769786225 is a wasteful number, since it uses less digits than its factorization.

19769786225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16138625 (or 16138613 counting only the distinct ones).

The product of its digits is 22861440, while the sum is 62.

The spelling of 19769786225 in words is "nineteen billion, seven hundred sixty-nine million, seven hundred eighty-six thousand, two hundred twenty-five".