20022240400 has 30 divisors (see below), whose sum is σ = 48103433522. Its totient is φ = 8008896000.

The previous prime is 20022240373. The next prime is 20022240409. The reversal of 20022240400 is 404222002.

It can be written as a sum of positive squares in 3 ways, for example, as 6203767696 + 13818472704 = 78764^2 + 117552^2 .

It is a super-2 number, since 2×20022240400² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (20022240409) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25027401 + ... + 25028200.

Almost surely, 2^20022240400 is an apocalyptic number.

20022240400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20022240400 is an abundant number, since it is smaller than the sum of its proper divisors (28081193122).

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

20022240400 is a wasteful number, since it uses less digits than its factorization.

20022240400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50055619 (or 50055608 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

Adding to 20022240400 its reverse (404222002), we get a palindrome (20426462402).

The spelling of 20022240400 in words is "twenty billion, twenty-two million, two hundred forty thousand, four hundred".