19720412 has 6 divisors (see below), whose sum is σ = 34510728. Its totient is φ = 9860204.

The previous prime is 19720403. The next prime is 19720447. The reversal of 19720412 is 21402791.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 2465048 + ... + 2465055.

It is an arithmetic number, because the mean of its divisors is an integer number (5751788).

Almost surely, 2^19720412 is an apocalyptic number.

It is an amenable number.

19720412 is a deficient number, since it is larger than the sum of its proper divisors (14790316).

19720412 is a wasteful number, since it uses less digits than its factorization.

19720412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4930107 (or 4930105 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 19720412 is about 4440.7670508596. The cubic root of 19720412 is about 270.1709571178.

The spelling of 19720412 in words is "nineteen million, seven hundred twenty thousand, four hundred twelve".