19472871 has 32 divisors (see below), whose sum is σ = 30371328. Its totient is φ = 10967040.

The previous prime is 19472863. The next prime is 19472903. The reversal of 19472871 is 17827491.

It is not a de Polignac number, because 19472871 - 2³ = 19472863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19472801) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57615 + ... + 57951.

It is an arithmetic number, because the mean of its divisors is an integer number (949104).

Almost surely, 2^19472871 is an apocalyptic number.

19472871 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

19472871 is a deficient number, since it is larger than the sum of its proper divisors (10898457).

19472871 is a wasteful number, since it uses less digits than its factorization.

19472871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471.

The product of its digits is 28224, while the sum is 39.

The square root of 19472871 is about 4412.8076096744. The cubic root of 19472871 is about 269.0357511574.

The spelling of 19472871 in words is "nineteen million, four hundred seventy-two thousand, eight hundred seventy-one".