20820801080 has 32 divisors (see below), whose sum is σ = 47161224000. Its totient is φ = 8272423296.

The previous prime is 20820801077. The next prime is 20820801107. The reversal of 20820801080 is 8010802802.

It is a super-2 number, since 2×20820801080² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1740752 + ... + 1752671.

It is an arithmetic number, because the mean of its divisors is an integer number (1473788250).

Almost surely, 2^20820801080 is an apocalyptic number.

20820801080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20820801080 is an abundant number, since it is smaller than the sum of its proper divisors (26340422920).

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

20820801080 is a wasteful number, since it uses less digits than its factorization.

20820801080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3493583 (or 3493579 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 29.

The spelling of 20820801080 in words is "twenty billion, eight hundred twenty million, eight hundred one thousand, eighty".