19930785 has 16 divisors (see below), whose sum is σ = 36445056. Its totient is φ = 9111168.

The previous prime is 19930769. The next prime is 19930787. The reversal of 19930785 is 58703991.

It is a happy number.

It is not a de Polignac number, because 19930785 - 2⁴ = 19930769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19930787) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94804 + ... + 95013.

It is an arithmetic number, because the mean of its divisors is an integer number (2277816).

Almost surely, 2^19930785 is an apocalyptic number.

19930785 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19930785 is a deficient number, since it is larger than the sum of its proper divisors (16514271).

19930785 is a wasteful number, since it uses less digits than its factorization.

19930785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189832.

The product of its (nonzero) digits is 68040, while the sum is 42.

The square root of 19930785 is about 4464.3907759066. The cubic root of 19930785 is about 271.1282690488.

The spelling of 19930785 in words is "nineteen million, nine hundred thirty thousand, seven hundred eighty-five".