19979057 has 8 divisors (see below), whose sum is σ = 23620800. Its totient is φ = 16534224.

The previous prime is 19979041. The next prime is 19979059. The reversal of 19979057 is 75097991.

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 19979057 - 2⁴ = 19979041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19979059) 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, 49007 + ... + 49412.

It is an arithmetic number, because the mean of its divisors is an integer number (2952600).

Almost surely, 2^19979057 is an apocalyptic number.

It is an amenable number.

19979057 is a deficient number, since it is larger than the sum of its proper divisors (3641743).

19979057 is an equidigital number, since it uses as much as digits as its factorization.

19979057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98455.

The product of its (nonzero) digits is 178605, while the sum is 47.

The square root of 19979057 is about 4469.7938431207. The cubic root of 19979057 is about 271.3469818220.

The spelling of 19979057 in words is "nineteen million, nine hundred seventy-nine thousand, fifty-seven".