19424986 has 8 divisors (see below), whose sum is σ = 33300000. Its totient is φ = 8324988.

The previous prime is 19424957. The next prime is 19424989. The reversal of 19424986 is 68942491.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×19424986² = 754660162200392, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19424989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 693736 + ... + 693763.

It is an arithmetic number, because the mean of its divisors is an integer number (4162500).

Almost surely, 2^19424986 is an apocalyptic number.

19424986 is a deficient number, since it is larger than the sum of its proper divisors (13875014).

19424986 is a wasteful number, since it uses less digits than its factorization.

19424986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1387508.

The product of its digits is 124416, while the sum is 43.

The square root of 19424986 is about 4407.3785859624. The cubic root of 19424986 is about 268.8150449375.

The spelling of 19424986 in words is "nineteen million, four hundred twenty-four thousand, nine hundred eighty-six".