19401474340 has 24 divisors (see below), whose sum is σ = 40745751480. Its totient is φ = 7760083968.

The previous prime is 19401474317. The next prime is 19401474347. The reversal of 19401474340 is 4347410491.

It can be written as a sum of positive squares in 4 ways, for example, as 1254151396 + 18147322944 = 35414^2 + 134712^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 19401474340.

It is not an unprimeable number, because it can be changed into a prime (19401474347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 505674 + ... + 542686.

It is an arithmetic number, because the mean of its divisors is an integer number (1697739645).

Almost surely, 2^19401474340 is an apocalyptic number.

19401474340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19401474340 is an abundant number, since it is smaller than the sum of its proper divisors (21344277140).

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

19401474340 is a wasteful number, since it uses less digits than its factorization.

19401474340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63231 (or 63229 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 37.

The spelling of 19401474340 in words is "nineteen billion, four hundred one million, four hundred seventy-four thousand, three hundred forty".