20857354 has 16 divisors (see below), whose sum is σ = 35957376. Its totient is φ = 8888400.

The previous prime is 20857321. The next prime is 20857357. The reversal of 20857354 is 45375802.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20857357) 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, 1582 + ... + 6649.

It is an arithmetic number, because the mean of its divisors is an integer number (2247336).

Almost surely, 2^20857354 is an apocalyptic number.

20857354 is a deficient number, since it is larger than the sum of its proper divisors (15100022).

20857354 is a wasteful number, since it uses less digits than its factorization.

20857354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8421.

The product of its (nonzero) digits is 33600, while the sum is 34.

The square root of 20857354 is about 4566.9852200330. The cubic root of 20857354 is about 275.2663161150.

The spelling of 20857354 in words is "twenty million, eight hundred fifty-seven thousand, three hundred fifty-four".