20422354 has 4 divisors (see below), whose sum is σ = 30633534. Its totient is φ = 10211176.

The previous prime is 20422343. The next prime is 20422357. The reversal of 20422354 is 45322402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 45322402 = 2 ⋅22661201.

It can be written as a sum of positive squares in only one way, i.e., 12145225 + 8277129 = 3485^2 + 2877^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (20422357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5105587 + ... + 5105590.

Almost surely, 2^20422354 is an apocalyptic number.

20422354 is a deficient number, since it is larger than the sum of its proper divisors (10211180).

20422354 is a wasteful number, since it uses less digits than its factorization.

20422354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10211179.

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 20422354 is about 4519.1098681046. The cubic root of 20422354 is about 273.3392090085.

Adding to 20422354 its reverse (45322402), we get a palindrome (65744756).

The spelling of 20422354 in words is "twenty million, four hundred twenty-two thousand, three hundred fifty-four".