2405333021 has 24 divisors (see below), whose sum is σ = 3016430424. Its totient is φ = 1901128320.

The previous prime is 2405333017. The next prime is 2405333023. The reversal of 2405333021 is 1203335042.

It can be written as a sum of positive squares in 4 ways, for example, as 264420121 + 2140912900 = 16261^2 + 46270^2 .

It is not a de Polignac number, because 2405333021 - 2² = 2405333017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2405333023) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1026311 + ... + 1028651.

It is an arithmetic number, because the mean of its divisors is an integer number (125684601).

Almost surely, 2^2405333021 is an apocalyptic number.

It is an amenable number.

2405333021 is a deficient number, since it is larger than the sum of its proper divisors (611097403).

2405333021 is a wasteful number, since it uses less digits than its factorization.

2405333021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3981 (or 3974 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 2405333021 is about 49044.1945697959. The cubic root of 2405333021 is about 1339.8568609635.

Adding to 2405333021 its reverse (1203335042), we get a palindrome (3608668063).

The spelling of 2405333021 in words is "two billion, four hundred five million, three hundred thirty-three thousand, twenty-one".