20355401211 has 8 divisors (see below), whose sum is σ = 27151886160. Its totient is φ = 13564591872.

The previous prime is 20355401203. The next prime is 20355401237. The reversal of 20355401211 is 11210455302.

It is a happy number.

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

It is not a de Polignac number, because 20355401211 - 2³ = 20355401203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20355401291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1410526 + ... + 1424883.

It is an arithmetic number, because the mean of its divisors is an integer number (3393985770).

Almost surely, 2^20355401211 is an apocalyptic number.

20355401211 is a deficient number, since it is larger than the sum of its proper divisors (6796484949).

20355401211 is a wasteful number, since it uses less digits than its factorization.

20355401211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2837805.

The product of its (nonzero) digits is 1200, while the sum is 24.

Adding to 20355401211 its reverse (11210455302), we get a palindrome (31565856513).

The spelling of 20355401211 in words is "twenty billion, three hundred fifty-five million, four hundred one thousand, two hundred eleven".