19934147790 has 56 divisors (see below), whose sum is σ = 53797608648. Its totient is φ = 5315770800.

The previous prime is 19934147773. The next prime is 19934147797. The reversal of 19934147790 is 9774143991.

19934147790 is a `hidden beast` number, since 199 + 341 + 47 + 79 + 0 = 666.

It is a super-2 number, since 2×19934147790² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19934147797) by changing a digit.

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 27 ways as a sum of consecutive naturals, for example, 1359936 + ... + 1374515.

It is an arithmetic number, because the mean of its divisors is an integer number (960671583).

Almost surely, 2^19934147790 is an apocalyptic number.

19934147790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19934147790 is an abundant number, since it is smaller than the sum of its proper divisors (33863460858).

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

19934147790 is an equidigital number, since it uses as much as digits as its factorization.

19934147790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2734476 (or 2734461 counting only the distinct ones).

The product of its (nonzero) digits is 1714608, while the sum is 54.

The spelling of 19934147790 in words is "nineteen billion, nine hundred thirty-four million, one hundred forty-seven thousand, seven hundred ninety".