4421426621 has 16 divisors (see below), whose sum is σ = 4499829888. Its totient is φ = 4343976000.

The previous prime is 4421426617. The next prime is 4421426663. The reversal of 4421426621 is 1266241244.

It is a cyclic number.

It is not a de Polignac number, because 4421426621 - 2² = 4421426617 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4421426021) 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, 9980426 + ... + 9980868.

It is an arithmetic number, because the mean of its divisors is an integer number (281239368).

Almost surely, 2^4421426621 is an apocalyptic number.

It is an amenable number.

4421426621 is a deficient number, since it is larger than the sum of its proper divisors (78403267).

4421426621 is a wasteful number, since it uses less digits than its factorization.

4421426621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1172.

The product of its digits is 18432, while the sum is 32.

The square root of 4421426621 is about 66493.8088922570. The cubic root of 4421426621 is about 1641.2981271011.

Adding to 4421426621 its reverse (1266241244), we get a palindrome (5687667865).

The spelling of 4421426621 in words is "four billion, four hundred twenty-one million, four hundred twenty-six thousand, six hundred twenty-one".