19494034951920 has 160 divisors (see below), whose sum is σ = 64596989528064. Its totient is φ = 4851113625600.

The previous prime is 19494034951871. The next prime is 19494034951931. The reversal of 19494034951920 is 2915943049491.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42841096 + ... + 43293735.

Almost surely, 2^{19494034951920} is an apocalyptic number.

19494034951920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19494034951920 is an abundant number, since it is smaller than the sum of its proper divisors (45102954576144).

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

19494034951920 is a wasteful number, since it uses less digits than its factorization.

19494034951920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86134911 (or 86134905 counting only the distinct ones).

The product of its (nonzero) digits is 12597120, while the sum is 60.

The spelling of 19494034951920 in words is "nineteen trillion, four hundred ninety-four billion, thirty-four million, nine hundred fifty-one thousand, nine hundred twenty".