26720658020 has 96 divisors (see below), whose sum is σ = 66966552576. Its totient is φ = 8756668800.

The previous prime is 26720658017. The next prime is 26720658023. The reversal of 26720658020 is 2085602762.

It is an interprime number because it is at equal distance from previous prime (26720658017) and next prime (26720658023).

It is not an unprimeable number, because it can be changed into a prime (26720658023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6795455 + ... + 6799385.

It is an arithmetic number, because the mean of its divisors is an integer number (697568256).

Almost surely, 2^26720658020 is an apocalyptic number.

26720658020 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 26720658020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33483276288).

26720658020 is an abundant number, since it is smaller than the sum of its proper divisors (40245894556).

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

26720658020 is a wasteful number, since it uses less digits than its factorization.

26720658020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6081 (or 6079 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 38.

The spelling of 26720658020 in words is "twenty-six billion, seven hundred twenty million, six hundred fifty-eight thousand, twenty".