20454100240 has 160 divisors (see below), whose sum is σ = 56112908544. Its totient is φ = 6787307520.

The previous prime is 20454100237. The next prime is 20454100243. The reversal of 20454100240 is 4200145402.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20454100237) and next prime (20454100243).

It is not an unprimeable number, because it can be changed into a prime (20454100243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4079335 + ... + 4084345.

Almost surely, 2^20454100240 is an apocalyptic number.

20454100240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20454100240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28056454272).

20454100240 is an abundant number, since it is smaller than the sum of its proper divisors (35658808304).

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

20454100240 is a wasteful number, since it uses less digits than its factorization.

20454100240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5265 (or 5259 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 22.

Adding to 20454100240 its reverse (4200145402), we get a palindrome (24654245642).

The spelling of 20454100240 in words is "twenty billion, four hundred fifty-four million, one hundred thousand, two hundred forty".