19842674546 has 4 divisors (see below), whose sum is σ = 29764011822. Its totient is φ = 9921337272.

The previous prime is 19842674543. The next prime is 19842674557. The reversal of 19842674546 is 64547624891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64547624891 = 131 ⋅492729961.

It can be written as a sum of positive squares in only one way, i.e., 13061975521 + 6780699025 = 114289^2 + 82345^2 .

It is a super-2 number, since 2×19842674546² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 19842674491 and 19842674500.

It is not an unprimeable number, because it can be changed into a prime (19842674543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4960668635 + ... + 4960668638.

Almost surely, 2^19842674546 is an apocalyptic number.

19842674546 is a deficient number, since it is larger than the sum of its proper divisors (9921337276).

19842674546 is an equidigital number, since it uses as much as digits as its factorization.

19842674546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9921337275.

The product of its digits is 11612160, while the sum is 56.

The spelling of 19842674546 in words is "nineteen billion, eight hundred forty-two million, six hundred seventy-four thousand, five hundred forty-six".