4203454021 has 12 divisors (see below), whose sum is σ = 4698503040. Its totient is φ = 3754941840.

The previous prime is 4203453971. The next prime is 4203454061. The reversal of 4203454021 is 1204543024.

It is a happy number.

It is not a de Polignac number, because 4203454021 - 2¹⁵ = 4203421253 is a prime.

It is a super-2 number, since 2×4203454021² = 35338051413322136882, 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 (4203454061) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 395931 + ... + 406408.

It is an arithmetic number, because the mean of its divisors is an integer number (391541920).

Almost surely, 2^4203454021 is an apocalyptic number.

It is an amenable number.

4203454021 is a deficient number, since it is larger than the sum of its proper divisors (495049019).

4203454021 is a wasteful number, since it uses less digits than its factorization.

4203454021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 802396 (or 802383 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 4203454021 is about 64834.0498580800. The cubic root of 4203454021 is about 1613.8708118543.

Adding to 4203454021 its reverse (1204543024), we get a palindrome (5407997045).

The spelling of 4203454021 in words is "four billion, two hundred three million, four hundred fifty-four thousand, twenty-one".