19801234 has 16 divisors (see below), whose sum is σ = 30150720. Its totient is φ = 9752400.

The previous prime is 19801231. The next prime is 19801279. The reversal of 19801234 is 43210891.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (19801231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52057 + ... + 52435.

It is an arithmetic number, because the mean of its divisors is an integer number (1884420).

Almost surely, 2^19801234 is an apocalyptic number.

19801234 is a deficient number, since it is larger than the sum of its proper divisors (10349486).

19801234 is a wasteful number, since it uses less digits than its factorization.

19801234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 705.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 19801234 is about 4449.8577505354. The cubic root of 19801234 is about 270.5395429656.

The spelling of 19801234 in words is "nineteen million, eight hundred one thousand, two hundred thirty-four".