2406416021 has 4 divisors (see below), whose sum is σ = 2427711852. Its totient is φ = 2385120192.

The previous prime is 2406416017. The next prime is 2406416083. The reversal of 2406416021 is 1206146042.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 609843025 + 1796572996 = 24695^2 + 42386^2 .

It is a cyclic number.

It is not a de Polignac number, because 2406416021 - 2² = 2406416017 is a prime.

It is a super-2 number, since 2×2406416021² = 11581676132250944882, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2406413021) 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, 10647746 + ... + 10647971.

It is an arithmetic number, because the mean of its divisors is an integer number (606927963).

Almost surely, 2^2406416021 is an apocalyptic number.

It is an amenable number.

2406416021 is a deficient number, since it is larger than the sum of its proper divisors (21295831).

2406416021 is a wasteful number, since it uses less digits than its factorization.

2406416021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21295830.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 2406416021 is about 49055.2343894105. The cubic root of 2406416021 is about 1340.0579207532.

The spelling of 2406416021 in words is "two billion, four hundred six million, four hundred sixteen thousand, twenty-one".