19979834 has 16 divisors (see below), whose sum is σ = 34898688. Its totient is φ = 8400912.

The previous prime is 19979807. The next prime is 19979891. The reversal of 19979834 is 43897991.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12722 + ... + 14205.

It is an arithmetic number, because the mean of its divisors is an integer number (2181168).

Almost surely, 2^19979834 is an apocalyptic number.

19979834 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

19979834 is a deficient number, since it is larger than the sum of its proper divisors (14918854).

19979834 is a wasteful number, since it uses less digits than its factorization.

19979834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26989.

The product of its digits is 489888, while the sum is 50.

The square root of 19979834 is about 4469.8807590360. The cubic root of 19979834 is about 271.3504994033.

The spelling of 19979834 in words is "nineteen million, nine hundred seventy-nine thousand, eight hundred thirty-four".