20922438 has 8 divisors (see below), whose sum is σ = 41844888. Its totient is φ = 6974144.

The previous prime is 20922413. The next prime is 20922463. The reversal of 20922438 is 83422902.

It is an interprime number because it is at equal distance from previous prime (20922413) and next prime (20922463).

It is a sphenic number, since it is the product of 3 distinct primes.

20922438 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1743531 + ... + 1743542.

It is an arithmetic number, because the mean of its divisors is an integer number (5230611).

Almost surely, 2^20922438 is an apocalyptic number.

20922438 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20922438 is a wasteful number, since it uses less digits than its factorization.

20922438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3487078.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 20922438 is about 4574.1051583889. The cubic root of 20922438 is about 275.5523356250.

The spelling of 20922438 in words is "twenty million, nine hundred twenty-two thousand, four hundred thirty-eight".