20810297088 has 360 divisors, whose sum is σ = 71300541312. Its totient is φ = 5913741312.

The previous prime is 20810297069. The next prime is 20810297111. The reversal of 20810297088 is 88079201802.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 44561431 + ... + 44561897.

Almost surely, 2^20810297088 is an apocalyptic number.

20810297088 is a gapful number since it is divisible by the number (28) 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 20810297088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35650270656).

20810297088 is an abundant number, since it is smaller than the sum of its proper divisors (50490244224).

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

20810297088 is an equidigital number, since it uses as much as digits as its factorization.

20810297088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 809 (or 786 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 45.

The spelling of 20810297088 in words is "twenty billion, eight hundred ten million, two hundred ninety-seven thousand, eighty-eight".