2021145423 has 16 divisors (see below), whose sum is σ = 2940844800. Its totient is φ = 1224521280.

The previous prime is 2021145397. The next prime is 2021145431. The reversal of 2021145423 is 3245411202.

It is not a de Polignac number, because 2021145423 - 2¹² = 2021141327 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2021145393 and 2021145402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021145023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108843 + ... + 126051.

It is an arithmetic number, because the mean of its divisors is an integer number (183802800).

Almost surely, 2^2021145423 is an apocalyptic number.

2021145423 is a deficient number, since it is larger than the sum of its proper divisors (919699377).

2021145423 is a wasteful number, since it uses less digits than its factorization.

2021145423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20782.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 2021145423 is about 44957.1509662256. The cubic root of 2021145423 is about 1264.3457532269.

Adding to 2021145423 its reverse (3245411202), we get a palindrome (5266556625).

The spelling of 2021145423 in words is "two billion, twenty-one million, one hundred forty-five thousand, four hundred twenty-three".