19837404378 has 24 divisors (see below), whose sum is σ = 46888410816. Its totient is φ = 6011334600.

The previous prime is 19837404373. The next prime is 19837404407. The reversal of 19837404378 is 87340473891.

It is a super-2 number, since 2×19837404378² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19837404373) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50094258 + ... + 50094653.

It is an arithmetic number, because the mean of its divisors is an integer number (1953683784).

Almost surely, 2^19837404378 is an apocalyptic number.

19837404378 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

19837404378 is an abundant number, since it is smaller than the sum of its proper divisors (27051006438).

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

19837404378 is a wasteful number, since it uses less digits than its factorization.

19837404378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100188930 (or 100188927 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 54.

The spelling of 19837404378 in words is "nineteen billion, eight hundred thirty-seven million, four hundred four thousand, three hundred seventy-eight".