19677970 has 32 divisors (see below), whose sum is σ = 38369520. Its totient is φ = 7223040.

The previous prime is 19677947. The next prime is 19677971. The reversal of 19677970 is 7977691.

It can be written as a sum of positive squares in 8 ways, for example, as 12766329 + 6911641 = 3573^2 + 2629^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 19677970.

It is not an unprimeable number, because it can be changed into a prime (19677971) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29440 + ... + 30100.

Almost surely, 2^19677970 is an apocalyptic number.

19677970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19677970 is a deficient number, since it is larger than the sum of its proper divisors (18691550).

19677970 is a wasteful number, since it uses less digits than its factorization.

19677970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 910.

The product of its (nonzero) digits is 166698, while the sum is 46.

The square root of 19677970 is about 4435.9857979935. The cubic root of 19677970 is about 269.9769984978.

The spelling of 19677970 in words is "nineteen million, six hundred seventy-seven thousand, nine hundred seventy".