19206993 has 8 divisors (see below), whose sum is σ = 27579328. Its totient is φ = 11819664.

The previous prime is 19206931. The next prime is 19207003. The reversal of 19206993 is 39960291.

It is a happy number.

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

It is not a de Polignac number, because 19206993 - 2¹⁰ = 19205969 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 492487 = 19206993 / (1 + 9 + 2 + 0 + 6 + 9 + 9 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19206493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 246205 + ... + 246282.

It is an arithmetic number, because the mean of its divisors is an integer number (3447416).

Almost surely, 2^19206993 is an apocalyptic number.

19206993 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

19206993 is a deficient number, since it is larger than the sum of its proper divisors (8372335).

19206993 is a wasteful number, since it uses less digits than its factorization.

19206993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492503.

The product of its (nonzero) digits is 26244, while the sum is 39.

The square root of 19206993 is about 4382.5783506972. The cubic root of 19206993 is about 267.8056854245.

The spelling of 19206993 in words is "nineteen million, two hundred six thousand, nine hundred ninety-three".