20212722 has 24 divisors (see below), whose sum is σ = 45699264. Its totient is φ = 6444504.

The previous prime is 20212721. The next prime is 20212723. The reversal of 20212722 is 22721202.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20212721) and next prime (20212723).

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

It is a junction number, because it is equal to n+sod(n) for n = 20212695 and 20212704.

It is not an unprimeable number, because it can be changed into a prime (20212721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23998 + ... + 24825.

It is an arithmetic number, because the mean of its divisors is an integer number (1904136).

Almost surely, 2^20212722 is an apocalyptic number.

20212722 is an abundant number, since it is smaller than the sum of its proper divisors (25486542).

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

20212722 is a wasteful number, since it uses less digits than its factorization.

20212722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48854 (or 48851 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 20212722 is about 4495.8560920029. The cubic root of 20212722 is about 272.4007303311.

Adding to 20212722 its reverse (22721202), we get a palindrome (42933924).

The spelling of 20212722 in words is "twenty million, two hundred twelve thousand, seven hundred twenty-two".