22421739 has 4 divisors (see below), whose sum is σ = 29895656. Its totient is φ = 14947824.

The previous prime is 22421699. The next prime is 22421747. The reversal of 22421739 is 93712422.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 22421739 - 2¹⁶ = 22356203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22421779) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3736954 + ... + 3736959.

It is an arithmetic number, because the mean of its divisors is an integer number (7473914).

Almost surely, 2^22421739 is an apocalyptic number.

22421739 is a deficient number, since it is larger than the sum of its proper divisors (7473917).

22421739 is an equidigital number, since it uses as much as digits as its factorization.

22421739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7473916.

The product of its digits is 6048, while the sum is 30.

The square root of 22421739 is about 4735.1598705852. The cubic root of 22421739 is about 281.9831110050.

The spelling of 22421739 in words is "twenty-two million, four hundred twenty-one thousand, seven hundred thirty-nine".