19857348930492 has 120 divisors (see below), whose sum is σ = 52808256879840. Its totient is φ = 6505300529280.

The previous prime is 19857348930457. The next prime is 19857348930527. The reversal of 19857348930492 is 29403984375891.

19857348930492 is a `hidden beast` number, since 1 + 9 + 8 + 5 + 7 + 3 + 48 + 93 + 0 + 492 = 666.

It is an interprime number because it is at equal distance from previous prime (19857348930457) and next prime (19857348930527).

It is a self number, because there is not a number n which added to its sum of digits gives 19857348930492.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 5930734 + ... + 8653802.

It is an arithmetic number, because the mean of its divisors is an integer number (440068807332).

Almost surely, 2^{19857348930492} is an apocalyptic number.

19857348930492 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19857348930492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26404128439920).

19857348930492 is an abundant number, since it is smaller than the sum of its proper divisors (32950907949348).

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

19857348930492 is a wasteful number, since it uses less digits than its factorization.

19857348930492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2723473 (or 2723462 counting only the distinct ones).

The product of its (nonzero) digits is 470292480, while the sum is 72.

The spelling of 19857348930492 in words is "nineteen trillion, eight hundred fifty-seven billion, three hundred forty-eight million, nine hundred thirty thousand, four hundred ninety-two".