19720150 has 24 divisors (see below), whose sum is σ = 36939600. Its totient is φ = 7832160.

The previous prime is 19720133. The next prime is 19720159. The reversal of 19720150 is 5102791.

It is a super-3 number, since 3×19720150³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19720159) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6127 + ... + 8773.

It is an arithmetic number, because the mean of its divisors is an integer number (1539150).

Almost surely, 2^19720150 is an apocalyptic number.

19720150 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19720150 is a deficient number, since it is larger than the sum of its proper divisors (17219450).

19720150 is a wasteful number, since it uses less digits than its factorization.

19720150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2808 (or 2803 counting only the distinct ones).

The product of its (nonzero) digits is 630, while the sum is 25.

The square root of 19720150 is about 4440.7375513534. The cubic root of 19720150 is about 270.1697606401.

The spelling of 19720150 in words is "nineteen million, seven hundred twenty thousand, one hundred fifty".