19948194774744 has 192 divisors, whose sum is σ = 53330231973600. Its totient is φ = 6210422507520.

The previous prime is 19948194774719. The next prime is 19948194774791. The reversal of 19948194774744 is 44747749184991.

It is a happy number.

It is a super-2 number, since 2×19948194774744² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19948194774744.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2178459414 + ... + 2178468570.

Almost surely, 2^{19948194774744} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19948194774744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26665115986800).

19948194774744 is an abundant number, since it is smaller than the sum of its proper divisors (33382037198856).

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

19948194774744 is a wasteful number, since it uses less digits than its factorization.

19948194774744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12514 (or 12479 counting only the distinct ones).

The product of its digits is 2048385024, while the sum is 78.

The spelling of 19948194774744 in words is "nineteen trillion, nine hundred forty-eight billion, one hundred ninety-four million, seven hundred seventy-four thousand, seven hundred forty-four".