22394421 has 24 divisors (see below), whose sum is σ = 38595840. Its totient is φ = 12796056.

The previous prime is 22394413. The next prime is 22394441. The reversal of 22394421 is 12449322.

22394421 is a `hidden beast` number, since 2 + 239 + 4 + 421 = 666.

It is not a de Polignac number, because 22394421 - 2³ = 22394413 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22394401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7141 + ... + 9786.

It is an arithmetic number, because the mean of its divisors is an integer number (1608160).

Almost surely, 2^22394421 is an apocalyptic number.

22394421 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22394421 is a deficient number, since it is larger than the sum of its proper divisors (16201419).

22394421 is a wasteful number, since it uses less digits than its factorization.

22394421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16950 (or 16937 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 22394421 is about 4732.2744003280. The cubic root of 22394421 is about 281.8685444349.

The spelling of 22394421 in words is "twenty-two million, three hundred ninety-four thousand, four hundred twenty-one".