20847521097270 has 640 divisors, whose sum is σ = 66348845700480. Its totient is φ = 4714870228992.

The previous prime is 20847521097203. The next prime is 20847521097281. The reversal of 20847521097270 is 7279012574802.

20847521097270 is a `hidden beast` number, since 2 + 0 + 8 + 4 + 7 + 521 + 0 + 97 + 27 + 0 = 666.

It is a super-2 number, since 2×20847521097270² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 319 ways as a sum of consecutive naturals, for example, 5093455344 + ... + 5093459436.

It is an arithmetic number, because the mean of its divisors is an integer number (103670071407).

Almost surely, 2^{20847521097270} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20847521097270, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33174422850240).

20847521097270 is an abundant number, since it is smaller than the sum of its proper divisors (45501324603210).

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

20847521097270 is an frugal number, since it uses more digits than its factorization.

20847521097270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4246 (or 4207 counting only the distinct ones).

The product of its (nonzero) digits is 3951360, while the sum is 54.

The spelling of 20847521097270 in words is "twenty trillion, eight hundred forty-seven billion, five hundred twenty-one million, ninety-seven thousand, two hundred seventy".