20579842 has 8 divisors (see below), whose sum is σ = 31113216. Its totient is φ = 10208772.

The previous prime is 20579837. The next prime is 20579851. The reversal of 20579842 is 24897502.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40258 + ... + 40765.

It is an arithmetic number, because the mean of its divisors is an integer number (3889152).

Almost surely, 2^20579842 is an apocalyptic number.

20579842 is a deficient number, since it is larger than the sum of its proper divisors (10533374).

20579842 is a wasteful number, since it uses less digits than its factorization.

20579842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81152.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 20579842 is about 4536.5010746169. The cubic root of 20579842 is about 274.0400335772.

The spelling of 20579842 in words is "twenty million, five hundred seventy-nine thousand, eight hundred forty-two".