20222420551 has 4 divisors (see below), whose sum is σ = 20553935704. Its totient is φ = 19890905400.

The previous prime is 20222420509. The next prime is 20222420597. The reversal of 20222420551 is 15502422202.

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 20222420551 - 2³³ = 11632485959 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 (20222400551) 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, 165757485 + ... + 165757606.

It is an arithmetic number, because the mean of its divisors is an integer number (5138483926).

Almost surely, 2^20222420551 is an apocalyptic number.

20222420551 is a deficient number, since it is larger than the sum of its proper divisors (331515153).

20222420551 is an equidigital number, since it uses as much as digits as its factorization.

20222420551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331515152.

The product of its (nonzero) digits is 3200, while the sum is 25.

Adding to 20222420551 its reverse (15502422202), we get a palindrome (35724842753).

The spelling of 20222420551 in words is "twenty billion, two hundred twenty-two million, four hundred twenty thousand, five hundred fifty-one".