4534990021 has 2 divisors, whose sum is σ = 4534990022. Its totient is φ = 4534990020.

The previous prime is 4534990013. The next prime is 4534990027. The reversal of 4534990021 is 1200994354.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2791008900 + 1743981121 = 52830^2 + 41761^2 .

It is a cyclic number.

It is not a de Polignac number, because 4534990021 - 2³ = 4534990013 is a prime.

It is a super-2 number, since 2×4534990021² = 41132268981139160882, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4534990027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2267495010 + 2267495011.

It is an arithmetic number, because the mean of its divisors is an integer number (2267495011).

Almost surely, 2^4534990021 is an apocalyptic number.

It is an amenable number.

4534990021 is a deficient number, since it is larger than the sum of its proper divisors (1).

4534990021 is an equidigital number, since it uses as much as digits as its factorization.

4534990021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 4534990021 is about 67342.3345377928. The cubic root of 4534990021 is about 1655.2316371199.

The spelling of 4534990021 in words is "four billion, five hundred thirty-four million, nine hundred ninety thousand, twenty-one".