19979495 has 8 divisors (see below), whose sum is σ = 24279360. Its totient is φ = 15780960.

The previous prime is 19979473. The next prime is 19979497. The reversal of 19979495 is 59497991.

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

It is not a de Polignac number, because 19979495 - 2¹⁰ = 19978471 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19979497) 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, 24896 + ... + 25685.

It is an arithmetic number, because the mean of its divisors is an integer number (3034920).

Almost surely, 2^19979495 is an apocalyptic number.

19979495 is a deficient number, since it is larger than the sum of its proper divisors (4299865).

19979495 is an equidigital number, since it uses as much as digits as its factorization.

19979495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50665.

The product of its digits is 918540, while the sum is 53.

The square root of 19979495 is about 4469.8428384005. The cubic root of 19979495 is about 271.3489647169.

The spelling of 19979495 in words is "nineteen million, nine hundred seventy-nine thousand, four hundred ninety-five".