20879894 has 8 divisors (see below), whose sum is σ = 35794128. Its totient is φ = 8948520.

The previous prime is 20879869. The next prime is 20879909. The reversal of 20879894 is 49897802.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 745697 + ... + 745724.

It is an arithmetic number, because the mean of its divisors is an integer number (4474266).

Almost surely, 2^20879894 is an apocalyptic number.

20879894 is a deficient number, since it is larger than the sum of its proper divisors (14914234).

20879894 is a wasteful number, since it uses less digits than its factorization.

20879894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1491430.

The product of its (nonzero) digits is 290304, while the sum is 47.

The square root of 20879894 is about 4569.4522647687. The cubic root of 20879894 is about 275.3654381335.

The spelling of 20879894 in words is "twenty million, eight hundred seventy-nine thousand, eight hundred ninety-four".