2030421653 has 4 divisors (see below), whose sum is σ = 2186607948. Its totient is φ = 1874235360.

The previous prime is 2030421649. The next prime is 2030421671. The reversal of 2030421653 is 3561240302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3561240302 = 2 ⋅1780620151.

It can be written as a sum of positive squares in 2 ways, for example, as 423454084 + 1606967569 = 20578^2 + 40087^2 .

It is a cyclic number.

It is not a de Polignac number, because 2030421653 - 2² = 2030421649 is a prime.

It is a super-2 number, since 2×2030421653² = 8245224177942504818, 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 (2030421683) 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, 78093128 + ... + 78093153.

It is an arithmetic number, because the mean of its divisors is an integer number (546651987).

Almost surely, 2^2030421653 is an apocalyptic number.

It is an amenable number.

2030421653 is a deficient number, since it is larger than the sum of its proper divisors (156186295).

2030421653 is a wasteful number, since it uses less digits than its factorization.

2030421653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156186294.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 2030421653 is about 45060.2003213479. The cubic root of 2030421653 is about 1266.2770780243.

Adding to 2030421653 its reverse (3561240302), we get a palindrome (5591661955).

The spelling of 2030421653 in words is "two billion, thirty million, four hundred twenty-one thousand, six hundred fifty-three".