20155394 has 16 divisors (see below), whose sum is σ = 35667456. Its totient is φ = 8359200.

The previous prime is 20155367. The next prime is 20155411. The reversal of 20155394 is 49355102.

20155394 = 2591² + 2592² + 2593².

20155394 is nontrivially palindromic in base 6.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22787 + ... + 23654.

It is an arithmetic number, because the mean of its divisors is an integer number (2229216).

Almost surely, 2^20155394 is an apocalyptic number.

20155394 is a deficient number, since it is larger than the sum of its proper divisors (15512062).

20155394 is a wasteful number, since it uses less digits than its factorization.

20155394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46481.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 20155394 is about 4489.4759159617. The cubic root of 20155394 is about 272.1429557788.

The spelling of 20155394 in words is "twenty million, one hundred fifty-five thousand, three hundred ninety-four".