20722618002280 has 32 divisors (see below), whose sum is σ = 47149776923400. Its totient is φ = 8195911837696.

The previous prime is 20722618002257. The next prime is 20722618002283. The reversal of 20722618002280 is 8220081622702.

It can be written as a sum of positive squares in 4 ways, for example, as 8138159740516 + 12584458261764 = 2852746^2 + 3547458^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (20722618002283) 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, 2910476497 + ... + 2910483616.

Almost surely, 2^{20722618002280} is an apocalyptic number.

20722618002280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20722618002280 is an abundant number, since it is smaller than the sum of its proper divisors (26427158921120).

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

20722618002280 is a wasteful number, since it uses less digits than its factorization.

20722618002280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5820960213 (or 5820960209 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 40.

Adding to 20722618002280 its reverse (8220081622702), we get a palindrome (28942699624982).

The spelling of 20722618002280 in words is "twenty trillion, seven hundred twenty-two billion, six hundred eighteen million, two thousand, two hundred eighty".