19730879 has 12 divisors (see below), whose sum is σ = 23574744. Its totient is φ = 16453584.

The previous prime is 19730857. The next prime is 19730891. The reversal of 19730879 is 97803791.

It is not a de Polignac number, because 19730879 - 2¹⁶ = 19665343 is a prime.

It is a super-2 number, since 2×19730879² = 778615172225282, which contains 22 as substring.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19730899) 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, 3629 + ... + 7254.

It is an arithmetic number, because the mean of its divisors is an integer number (1964562).

Almost surely, 2^19730879 is an apocalyptic number.

19730879 is a deficient number, since it is larger than the sum of its proper divisors (3843865).

19730879 is a wasteful number, since it uses less digits than its factorization.

19730879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10934 (or 10927 counting only the distinct ones).

The product of its (nonzero) digits is 95256, while the sum is 44.

The square root of 19730879 is about 4441.9454071386. The cubic root of 19730879 is about 270.2187481957.

The spelling of 19730879 in words is "nineteen million, seven hundred thirty thousand, eight hundred seventy-nine".