20422051 has 4 divisors (see below), whose sum is σ = 21992992. Its totient is φ = 18851112.

The previous prime is 20422043. The next prime is 20422079. The reversal of 20422051 is 15022402.

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

It is a cyclic number.

It is not a de Polignac number, because 20422051 - 2³ = 20422043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20422001) 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, 785451 + ... + 785476.

It is an arithmetic number, because the mean of its divisors is an integer number (5498248).

Almost surely, 2^20422051 is an apocalyptic number.

20422051 is a deficient number, since it is larger than the sum of its proper divisors (1570941).

20422051 is a wasteful number, since it uses less digits than its factorization.

20422051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1570940.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 20422051 is about 4519.0763436791. The cubic root of 20422051 is about 273.3378571860.

Adding to 20422051 its reverse (15022402), we get a palindrome (35444453).

The spelling of 20422051 in words is "twenty million, four hundred twenty-two thousand, fifty-one".