20355253400354 has 8 divisors (see below), whose sum is σ = 30534295756140. Its totient is φ = 10177154814976.

The previous prime is 20355253400351. The next prime is 20355253400393. The reversal of 20355253400354 is 45300435255302.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 18313563919225 + 2041689481129 = 4279435^2 + 1428877^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (20355253400351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 235888679 + ... + 235974954.

Almost surely, 2^{20355253400354} is an apocalyptic number.

20355253400354 is a deficient number, since it is larger than the sum of its proper divisors (10179042355786).

20355253400354 is a wasteful number, since it uses less digits than its factorization.

20355253400354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471885204.

The product of its (nonzero) digits is 1080000, while the sum is 41.

Adding to 20355253400354 its reverse (45300435255302), we get a palindrome (65655688655656).

The spelling of 20355253400354 in words is "twenty trillion, three hundred fifty-five billion, two hundred fifty-three million, four hundred thousand, three hundred fifty-four".