4026902021 has 2 divisors, whose sum is σ = 4026902022. Its totient is φ = 4026902020.

The previous prime is 4026901987. The next prime is 4026902023. The reversal of 4026902021 is 1202096204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2757405121 + 1269496900 = 52511^2 + 35630^2 .

It is a cyclic number.

It is not a de Polignac number, because 4026902021 - 2¹⁴ = 4026885637 is a prime.

Together with 4026902023, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4026902023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2013451010 + 2013451011.

It is an arithmetic number, because the mean of its divisors is an integer number (2013451011).

Almost surely, 2^4026902021 is an apocalyptic number.

It is an amenable number.

4026902021 is a deficient number, since it is larger than the sum of its proper divisors (1).

4026902021 is an equidigital number, since it uses as much as digits as its factorization.

4026902021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 4026902021 is about 63457.8759572049. The cubic root of 4026902021 is about 1590.9517950146.

Adding to 4026902021 its reverse (1202096204), we get a palindrome (5228998225).

The spelling of 4026902021 in words is "four billion, twenty-six million, nine hundred two thousand, twenty-one".