19472855 has 4 divisors (see below), whose sum is σ = 23367432. Its totient is φ = 15578280.

The previous prime is 19472839. The next prime is 19472857. The reversal of 19472855 is 55827491.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 19472855 - 2⁴ = 19472839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19472857) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1947281 + ... + 1947290.

It is an arithmetic number, because the mean of its divisors is an integer number (5841858).

Almost surely, 2^19472855 is an apocalyptic number.

19472855 is a deficient number, since it is larger than the sum of its proper divisors (3894577).

19472855 is an equidigital number, since it uses as much as digits as its factorization.

19472855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3894576.

The product of its digits is 100800, while the sum is 41.

The square root of 19472855 is about 4412.8057967692. The cubic root of 19472855 is about 269.0356774724.

The spelling of 19472855 in words is "nineteen million, four hundred seventy-two thousand, eight hundred fifty-five".