20212011455 has 4 divisors (see below), whose sum is σ = 24254413752. Its totient is φ = 16169609160.

The previous prime is 20212011427. The next prime is 20212011473. The reversal of 20212011455 is 55411021202.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20212011455 - 2¹⁰ = 20212010431 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20212011455.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2021201141 + ... + 2021201150.

It is an arithmetic number, because the mean of its divisors is an integer number (6063603438).

Almost surely, 2^20212011455 is an apocalyptic number.

20212011455 is a deficient number, since it is larger than the sum of its proper divisors (4042402297).

20212011455 is an equidigital number, since it uses as much as digits as its factorization.

20212011455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4042402296.

The product of its (nonzero) digits is 800, while the sum is 23.

Adding to 20212011455 its reverse (55411021202), we get a palindrome (75623032657).

The spelling of 20212011455 in words is "twenty billion, two hundred twelve million, eleven thousand, four hundred fifty-five".