19472985 has 24 divisors (see below), whose sum is σ = 38575680. Its totient is φ = 8901792.

The previous prime is 19472977. The next prime is 19472987. The reversal of 19472985 is 58927491.

It is not a de Polignac number, because 19472985 - 2³ = 19472977 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 19472985.

It is not an unprimeable number, because it can be changed into a prime (19472987) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30595 + ... + 31224.

It is an arithmetic number, because the mean of its divisors is an integer number (1607320).

Almost surely, 2^19472985 is an apocalyptic number.

19472985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19472985 is a deficient number, since it is larger than the sum of its proper divisors (19102695).

19472985 is a wasteful number, since it uses less digits than its factorization.

19472985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61837 (or 61834 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 19472985 is about 4412.8205266020. The cubic root of 19472985 is about 269.0362761615.

The spelling of 19472985 in words is "nineteen million, four hundred seventy-two thousand, nine hundred eighty-five".