4202423021 has 12 divisors (see below), whose sum is σ = 4438204992. Its totient is φ = 3978585864.

The previous prime is 4202423009. The next prime is 4202423107. The reversal of 4202423021 is 1203242024.

It is not a de Polignac number, because 4202423021 - 2¹⁸ = 4202160877 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4202422984 and 4202423002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4202425021) 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, 728876 + ... + 734618.

It is an arithmetic number, because the mean of its divisors is an integer number (369850416).

Almost surely, 2^4202423021 is an apocalyptic number.

It is an amenable number.

4202423021 is a deficient number, since it is larger than the sum of its proper divisors (235781971).

4202423021 is a wasteful number, since it uses less digits than its factorization.

4202423021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7808 (or 7789 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 4202423021 is about 64826.0983015328. The cubic root of 4202423021 is about 1613.7388539569.

Adding to 4202423021 its reverse (1203242024), we get a palindrome (5405665045).

The spelling of 4202423021 in words is "four billion, two hundred two million, four hundred twenty-three thousand, twenty-one".