20356354 has 4 divisors (see below), whose sum is σ = 30534534. Its totient is φ = 10178176.

The previous prime is 20356337. The next prime is 20356363. The reversal of 20356354 is 45365302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 45365302 = 2 ⋅22682651.

It can be written as a sum of positive squares in only one way, i.e., 12766329 + 7590025 = 3573^2 + 2755^2 .

It is a super-2 number, since 2×20356354² = 828762296346632, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5089087 + ... + 5089090.

Almost surely, 2^20356354 is an apocalyptic number.

20356354 is a deficient number, since it is larger than the sum of its proper divisors (10178180).

20356354 is a wasteful number, since it uses less digits than its factorization.

20356354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10178179.

The product of its (nonzero) digits is 10800, while the sum is 28.

The square root of 20356354 is about 4511.8016357105. The cubic root of 20356354 is about 273.0444363166.

The spelling of 20356354 in words is "twenty million, three hundred fifty-six thousand, three hundred fifty-four".