19146946820 has 12 divisors (see below), whose sum is σ = 40208588364. Its totient is φ = 7658778720.

The previous prime is 19146946811. The next prime is 19146946837. The reversal of 19146946820 is 2864964191.

It can be written as a sum of positive squares in 2 ways, for example, as 4468655104 + 14678291716 = 66848^2 + 121154^2 .

It is a super-2 number, since 2×19146946820² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 478673651 + ... + 478673690.

It is an arithmetic number, because the mean of its divisors is an integer number (3350715697).

Almost surely, 2^19146946820 is an apocalyptic number.

19146946820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19146946820 is an abundant number, since it is smaller than the sum of its proper divisors (21061641544).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19146946820 is a wasteful number, since it uses less digits than its factorization.

19146946820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 957347350 (or 957347348 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 50.

The spelling of 19146946820 in words is "nineteen billion, one hundred forty-six million, nine hundred forty-six thousand, eight hundred twenty".