19746009747 has 24 divisors (see below), whose sum is σ = 29474338608. Its totient is φ = 12730536000.

The previous prime is 19746009727. The next prime is 19746009763. The reversal of 19746009747 is 74790064791.

19746009747 is a `hidden beast` number, since 1 + 97 + 460 + 0 + 97 + 4 + 7 = 666.

It is not a de Polignac number, because 19746009747 - 2¹⁵ = 19745976979 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19746009693 and 19746009702.

It is not an unprimeable number, because it can be changed into a prime (19746009727) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 213504 + ... + 291677.

It is an arithmetic number, because the mean of its divisors is an integer number (1228097442).

Almost surely, 2^19746009747 is an apocalyptic number.

19746009747 is a deficient number, since it is larger than the sum of its proper divisors (9728328861).

19746009747 is a wasteful number, since it uses less digits than its factorization.

19746009747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505331 (or 505328 counting only the distinct ones).

The product of its (nonzero) digits is 2667168, while the sum is 54.

The spelling of 19746009747 in words is "nineteen billion, seven hundred forty-six million, nine thousand, seven hundred forty-seven".