2042432021 has 4 divisors (see below), whose sum is σ = 2334208032. Its totient is φ = 1750656012.

The previous prime is 2042431987. The next prime is 2042432023. The reversal of 2042432021 is 1202342402.

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 not a de Polignac number, because 2042432021 - 2²² = 2038237717 is a prime.

It is a super-2 number, since 2×2042432021² = 8343057120812288882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2042431984 and 2042432002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2042432023) 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, 145887995 + ... + 145888008.

It is an arithmetic number, because the mean of its divisors is an integer number (583552008).

Almost surely, 2^2042432021 is an apocalyptic number.

It is an amenable number.

2042432021 is a deficient number, since it is larger than the sum of its proper divisors (291776011).

2042432021 is an equidigital number, since it uses as much as digits as its factorization.

2042432021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291776010.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 2042432021 is about 45193.2740681620. The cubic root of 2042432021 is about 1268.7689356100.

Adding to 2042432021 its reverse (1202342402), we get a palindrome (3244774423).

The spelling of 2042432021 in words is "two billion, forty-two million, four hundred thirty-two thousand, twenty-one".