19380947 has 2 divisors, whose sum is σ = 19380948. Its totient is φ = 19380946.

The previous prime is 19380943. The next prime is 19380953. The reversal of 19380947 is 74908391.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19380947 - 2² = 19380943 is a prime.

It is a super-2 number, since 2×19380947² = 751242213233618, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (19380943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9690473 + 9690474.

It is an arithmetic number, because the mean of its divisors is an integer number (9690474).

Almost surely, 2^19380947 is an apocalyptic number.

19380947 is a deficient number, since it is larger than the sum of its proper divisors (1).

19380947 is an equidigital number, since it uses as much as digits as its factorization.

19380947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 19380947 is about 4402.3796973909. The cubic root of 19380947 is about 268.6117448611.

The spelling of 19380947 in words is "nineteen million, three hundred eighty thousand, nine hundred forty-seven".