26973178020 has 72 divisors (see below), whose sum is σ = 81854640504. Its totient is φ = 7189682688.

The previous prime is 26973178013. The next prime is 26973178021. The reversal of 26973178020 is 2087137962.

It can be written as a sum of positive squares in 4 ways, for example, as 5033051136 + 21940126884 = 70944^2 + 148122^2 .

It is a super-2 number, since 2×26973178020² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (26973178021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 392472 + ... + 456048.

It is an arithmetic number, because the mean of its divisors is an integer number (1136870007).

Almost surely, 2^26973178020 is an apocalyptic number.

26973178020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26973178020 is an abundant number, since it is smaller than the sum of its proper divisors (54881462484).

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

26973178020 is a wasteful number, since it uses less digits than its factorization.

26973178020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65949 (or 65944 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The spelling of 26973178020 in words is "twenty-six billion, nine hundred seventy-three million, one hundred seventy-eight thousand, twenty".