2021198706433 has 4 divisors (see below), whose sum is σ = 2021568150528. Its totient is φ = 2020829262340.

The previous prime is 2021198706419. The next prime is 2021198706473. The reversal of 2021198706433 is 3346078911202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2021198706433 - 2³³ = 2012608771841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2021198706473) 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, 184713841 + ... + 184724782.

It is an arithmetic number, because the mean of its divisors is an integer number (505392037632).

Almost surely, 2^{2021198706433} is an apocalyptic number.

It is an amenable number.

2021198706433 is a deficient number, since it is larger than the sum of its proper divisors (369444095).

2021198706433 is an equidigital number, since it uses as much as digits as its factorization.

2021198706433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369444094.

The product of its (nonzero) digits is 435456, while the sum is 46.

The spelling of 2021198706433 in words is "two trillion, twenty-one billion, one hundred ninety-eight million, seven hundred six thousand, four hundred thirty-three".