4021626021 has 16 divisors (see below), whose sum is σ = 6132172800. Its totient is φ = 2296579248.

The previous prime is 4021625987. The next prime is 4021626047. The reversal of 4021626021 is 1206261204.

4021626021 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 4021626021 - 2⁶ = 4021625957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4021625982 and 4021626000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4021626221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28681 + ... + 94158.

It is an arithmetic number, because the mean of its divisors is an integer number (383260800).

Almost surely, 2^4021626021 is an apocalyptic number.

It is an amenable number.

4021626021 is a deficient number, since it is larger than the sum of its proper divisors (2110546779).

4021626021 is a wasteful number, since it uses less digits than its factorization.

4021626021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124408.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 4021626021 is about 63416.2914478606. The cubic root of 4021626021 is about 1590.2566758598.

Adding to 4021626021 its reverse (1206261204), we get a palindrome (5227887225).

The spelling of 4021626021 in words is "four billion, twenty-one million, six hundred twenty-six thousand, twenty-one".