20112553211 has 4 divisors (see below), whose sum is σ = 20235943272. Its totient is φ = 19989163152.

The previous prime is 20112553183. The next prime is 20112553231. The reversal of 20112553211 is 11235521102.

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

It is a cyclic number.

It is not a de Polignac number, because 20112553211 - 2¹⁴ = 20112536827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20112553231) 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, 61694786 + ... + 61695111.

It is an arithmetic number, because the mean of its divisors is an integer number (5058985818).

Almost surely, 2^20112553211 is an apocalyptic number.

20112553211 is a deficient number, since it is larger than the sum of its proper divisors (123390061).

20112553211 is a wasteful number, since it uses less digits than its factorization.

20112553211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123390060.

The product of its (nonzero) digits is 600, while the sum is 23.

The spelling of 20112553211 in words is "twenty billion, one hundred twelve million, five hundred fifty-three thousand, two hundred eleven".