19742773715 has 16 divisors (see below), whose sum is σ = 27446708928. Its totient is φ = 13352449536.

The previous prime is 19742773709. The next prime is 19742773751. The reversal of 19742773715 is 51737724791.

It is a cyclic number.

It is not a de Polignac number, because 19742773715 - 2¹⁸ = 19742511571 is a prime.

It is a super-2 number, since 2×19742773715² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3861002 + ... + 3866111.

It is an arithmetic number, because the mean of its divisors is an integer number (1715419308).

Almost surely, 2^19742773715 is an apocalyptic number.

19742773715 is a deficient number, since it is larger than the sum of its proper divisors (7703935213).

19742773715 is an equidigital number, since it uses as much as digits as its factorization.

19742773715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7727198.

The product of its digits is 2593080, while the sum is 53.

The spelling of 19742773715 in words is "nineteen billion, seven hundred forty-two million, seven hundred seventy-three thousand, seven hundred fifteen".