19872070 has 16 divisors (see below), whose sum is σ = 36531648. Its totient is φ = 7779520.

The previous prime is 19872037. The next prime is 19872077. The reversal of 19872070 is 7027891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19872077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20671 + ... + 21610.

It is an arithmetic number, because the mean of its divisors is an integer number (2283228).

Almost surely, 2^19872070 is an apocalyptic number.

19872070 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19872070 is a deficient number, since it is larger than the sum of its proper divisors (16659578).

19872070 is a wasteful number, since it uses less digits than its factorization.

19872070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42335.

The product of its (nonzero) digits is 7056, while the sum is 34.

The square root of 19872070 is about 4457.8100004374. The cubic root of 19872070 is about 270.8617641685.

The spelling of 19872070 in words is "nineteen million, eight hundred seventy-two thousand, seventy".