2044042021 has 16 divisors (see below), whose sum is σ = 2460290560. Its totient is φ = 1658951280.

The previous prime is 2044041977. The next prime is 2044042027. The reversal of 2044042021 is 1202404402.

It is not a de Polignac number, because 2044042021 - 2⁷ = 2044041893 is a prime.

It is a super-2 number, since 2×2044042021² = 8356215567227528882, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 2044042021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2044042027) 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, 405406 + ... + 410416.

It is an arithmetic number, because the mean of its divisors is an integer number (153768160).

Almost surely, 2^2044042021 is an apocalyptic number.

It is an amenable number.

2044042021 is a deficient number, since it is larger than the sum of its proper divisors (416248539).

2044042021 is a wasteful number, since it uses less digits than its factorization.

2044042021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8104.

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 2044042021 is about 45211.0829443401. The cubic root of 2044042021 is about 1269.1022280540.

Adding to 2044042021 its reverse (1202404402), we get a palindrome (3246446423).

The spelling of 2044042021 in words is "two billion, forty-four million, forty-two thousand, twenty-one".