4020421511 has 8 divisors (see below), whose sum is σ = 4264034400. Its totient is φ = 3777599488.

The previous prime is 4020421499. The next prime is 4020421513. The reversal of 4020421511 is 1151240204.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4020421511 - 2¹⁴ = 4020405127 is a prime.

It is a super-2 number, since 2×4020421511² = 32327578252223046242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4020421513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187226 + ... + 207591.

It is an arithmetic number, because the mean of its divisors is an integer number (533004300).

Almost surely, 2^4020421511 is an apocalyptic number.

4020421511 is a deficient number, since it is larger than the sum of its proper divisors (243612889).

4020421511 is a wasteful number, since it uses less digits than its factorization.

4020421511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395433.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 4020421511 is about 63406.7938867753. The cubic root of 4020421511 is about 1590.0978950313.

Adding to 4020421511 its reverse (1151240204), we get a palindrome (5171661715).

The spelling of 4020421511 in words is "four billion, twenty million, four hundred twenty-one thousand, five hundred eleven".