20394451 has 16 divisors (see below), whose sum is σ = 25590528. Its totient is φ = 15789600.

The previous prime is 20394449. The next prime is 20394463. The reversal of 20394451 is 15449302.

It is a cyclic number.

It is not a de Polignac number, because 20394451 - 2¹ = 20394449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20394401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12556 + ... + 14086.

It is an arithmetic number, because the mean of its divisors is an integer number (1599408).

Almost surely, 2^20394451 is an apocalyptic number.

20394451 is a deficient number, since it is larger than the sum of its proper divisors (5196077).

20394451 is a wasteful number, since it uses less digits than its factorization.

20394451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1722.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 20394451 is about 4516.0215898510. The cubic root of 20394451 is about 273.2146647605.

The spelling of 20394451 in words is "twenty million, three hundred ninety-four thousand, four hundred fifty-one".