4221023420 has 24 divisors (see below), whose sum is σ = 8900940048. Its totient is φ = 1681401600.

The previous prime is 4221023369. The next prime is 4221023461. The reversal of 4221023420 is 243201224.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 4221023392 and 4221023401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 433046 + ... + 442685.

It is an arithmetic number, because the mean of its divisors is an integer number (370872502).

Almost surely, 2^4221023420 is an apocalyptic number.

It is an amenable number.

4221023420 is an abundant number, since it is smaller than the sum of its proper divisors (4679916628).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4221023420 is a wasteful number, since it uses less digits than its factorization.

4221023420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 875981 (or 875979 counting only the distinct ones).

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

The square root of 4221023420 is about 64969.4037220598. The cubic root of 4221023420 is about 1616.1162133976.

Adding to 4221023420 its reverse (243201224), we get a palindrome (4464224644).

The spelling of 4221023420 in words is "four billion, two hundred twenty-one million, twenty-three thousand, four hundred twenty".