20422141 has 4 divisors (see below), whose sum is σ = 20920284. Its totient is φ = 19924000.

The previous prime is 20422139. The next prime is 20422147. The reversal of 20422141 is 14122402.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2325625 + 18096516 = 1525^2 + 4254^2 .

It is a cyclic number.

It is not a de Polignac number, because 20422141 - 2¹ = 20422139 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20422147) 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, 249010 + ... + 249091.

It is an arithmetic number, because the mean of its divisors is an integer number (5230071).

Almost surely, 2^20422141 is an apocalyptic number.

It is an amenable number.

20422141 is a deficient number, since it is larger than the sum of its proper divisors (498143).

20422141 is an equidigital number, since it uses as much as digits as its factorization.

20422141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498142.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 20422141 is about 4519.0863014552. The cubic root of 20422141 is about 273.3382587188.

Adding to 20422141 its reverse (14122402), we get a palindrome (34544543).

The spelling of 20422141 in words is "twenty million, four hundred twenty-two thousand, one hundred forty-one".