19500072 has 16 divisors (see below), whose sum is σ = 48750240. Its totient is φ = 6500016.

The previous prime is 19500059. The next prime is 19500083. The reversal of 19500072 is 27000591.

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 812503 = 19500072 / (1 + 9 + 5 + 0 + 0 + 0 + 7 + 2).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 406228 + ... + 406275.

It is an arithmetic number, because the mean of its divisors is an integer number (3046890).

Almost surely, 2^19500072 is an apocalyptic number.

19500072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19500072 is an abundant number, since it is smaller than the sum of its proper divisors (29250168).

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

19500072 is a wasteful number, since it uses less digits than its factorization.

19500072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 812512 (or 812508 counting only the distinct ones).

The product of its (nonzero) digits is 630, while the sum is 24.

The square root of 19500072 is about 4415.8885855510. Note that the first 3 decimals coincide. The cubic root of 19500072 is about 269.1609618786.

The spelling of 19500072 in words is "nineteen million, five hundred thousand, seventy-two".