20394458 has 16 divisors (see below), whose sum is σ = 37018944. Its totient is φ = 8226240.

The previous prime is 20394449. The next prime is 20394463. The reversal of 20394458 is 85449302.

It is a super-2 number, since 2×20394458² = 831867834227528, which contains 22 as substring.

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, 42608 + ... + 43083.

It is an arithmetic number, because the mean of its divisors is an integer number (2313684).

Almost surely, 2^20394458 is an apocalyptic number.

20394458 is a deficient number, since it is larger than the sum of its proper divisors (16624486).

20394458 is a wasteful number, since it uses less digits than its factorization.

20394458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85717.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 20394458 is about 4516.0223648693. The cubic root of 20394458 is about 273.2146960190.

The spelling of 20394458 in words is "twenty million, three hundred ninety-four thousand, four hundred fifty-eight".