20422134 has 24 divisors (see below), whose sum is σ = 46851480. Its totient is φ = 6406848.

The previous prime is 20422133. The next prime is 20422139. The reversal of 20422134 is 43122402.

It is a super-2 number, since 2×20422134² = 834127114227912, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20422133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33064 + ... + 33675.

It is an arithmetic number, because the mean of its divisors is an integer number (1952145).

Almost surely, 2^20422134 is an apocalyptic number.

20422134 is an abundant number, since it is smaller than the sum of its proper divisors (26429346).

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

20422134 is a wasteful number, since it uses less digits than its factorization.

20422134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66764 (or 66761 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 20422134 is about 4519.0855269623. The cubic root of 20422134 is about 273.3382274885.

Adding to 20422134 its reverse (43122402), we get a palindrome (63544536).

The spelling of 20422134 in words is "twenty million, four hundred twenty-two thousand, one hundred thirty-four".