20280626240 has 56 divisors (see below), whose sum is σ = 55192281792. Its totient is φ = 6953356800.

The previous prime is 20280626227. The next prime is 20280626243. The reversal of 20280626240 is 4262608202.

It is a tau number, because it is divible by the number of its divisors (56).

It is a super-2 number, since 2×20280626240² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 20280626197 and 20280626206.

It is not an unprimeable number, because it can be changed into a prime (20280626243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4524686 + ... + 4529165.

Almost surely, 2^20280626240 is an apocalyptic number.

20280626240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20280626240 is an abundant number, since it is smaller than the sum of its proper divisors (34911655552).

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

20280626240 is an equidigital number, since it uses as much as digits as its factorization.

20280626240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9053875 (or 9053865 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 32.

It can be divided in two parts, 2028062 and 6240, that added together give a palindrome (2034302).

The spelling of 20280626240 in words is "twenty billion, two hundred eighty million, six hundred twenty-six thousand, two hundred forty".