20840074 has 8 divisors (see below), whose sum is σ = 32905440. Its totient is φ = 9871596.

The previous prime is 20840063. The next prime is 20840087. The reversal of 20840074 is 47004802.

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, 274174 + ... + 274249.

It is an arithmetic number, because the mean of its divisors is an integer number (4113180).

Almost surely, 2^20840074 is an apocalyptic number.

20840074 is a deficient number, since it is larger than the sum of its proper divisors (12065366).

20840074 is a wasteful number, since it uses less digits than its factorization.

20840074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548444.

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 20840074 is about 4565.0929891953. The cubic root of 20840074 is about 275.1902771291.

Adding to 20840074 its reverse (47004802), we get a palindrome (67844876).

The spelling of 20840074 in words is "twenty million, eight hundred forty thousand, seventy-four".