19642120 has 32 divisors (see below), whose sum is σ = 44455320. Its totient is φ = 7810560.

The previous prime is 19642093. The next prime is 19642141. The reversal of 19642120 is 2124691.

It can be written as a sum of positive squares in 4 ways, for example, as 15634116 + 4008004 = 3954^2 + 2002^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5884 + ... + 8596.

Almost surely, 2^19642120 is an apocalyptic number.

19642120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19642120 is an abundant number, since it is smaller than the sum of its proper divisors (24813200).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19642120 is a wasteful number, since it uses less digits than its factorization.

19642120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2905 (or 2901 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 19642120 is about 4431.9431404295. The cubic root of 19642120 is about 269.8129477175.

The spelling of 19642120 in words is "nineteen million, six hundred forty-two thousand, one hundred twenty".