20570894 has 8 divisors (see below), whose sum is σ = 30912840. Its totient is φ = 10266616.

The previous prime is 20570861. The next prime is 20570903. The reversal of 20570894 is 49807502.

It is a happy number.

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, 8009 + ... + 10260.

It is an arithmetic number, because the mean of its divisors is an integer number (3864105).

Almost surely, 2^20570894 is an apocalyptic number.

20570894 is a deficient number, since it is larger than the sum of its proper divisors (10341946).

20570894 is a wasteful number, since it uses less digits than its factorization.

20570894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18834.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 20570894 is about 4535.5147447671. The cubic root of 20570894 is about 274.0003107958. Note that the first 3 decimals are identical.

The spelling of 20570894 in words is "twenty million, five hundred seventy thousand, eight hundred ninety-four".