19757020747 has 16 divisors (see below), whose sum is σ = 21076206912. Its totient is φ = 18455500800.

The previous prime is 19757020741. The next prime is 19757020753. The reversal of 19757020747 is 74702075791.

It is an interprime number because it is at equal distance from previous prime (19757020741) and next prime (19757020753).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19757020747 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19757020747.

It is not an unprimeable number, because it can be changed into a prime (19757020741) 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 15 ways as a sum of consecutive naturals, for example, 3727203 + ... + 3732499.

It is an arithmetic number, because the mean of its divisors is an integer number (1317262932).

Almost surely, 2^19757020747 is an apocalyptic number.

19757020747 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

19757020747 is a deficient number, since it is larger than the sum of its proper divisors (1319186165).

19757020747 is a wasteful number, since it uses less digits than its factorization.

19757020747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6918.

The product of its (nonzero) digits is 864360, while the sum is 49.

The spelling of 19757020747 in words is "nineteen billion, seven hundred fifty-seven million, twenty thousand, seven hundred forty-seven".