20497726080 has 384 divisors, whose sum is σ = 78621192000. Its totient is φ = 5044875264.

The previous prime is 20497726079. The next prime is 20497726103. The reversal of 20497726080 is 8062779402.

20497726080 is a `hidden beast` number, since 20 + 497 + 7 + 2 + 60 + 80 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2916811 + ... + 2923829.

Almost surely, 2^20497726080 is an apocalyptic number.

20497726080 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 20497726080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39310596000).

20497726080 is an abundant number, since it is smaller than the sum of its proper divisors (58123465920).

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

20497726080 is a wasteful number, since it uses less digits than its factorization.

20497726080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7073 (or 7042 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The spelling of 20497726080 in words is "twenty billion, four hundred ninety-seven million, seven hundred twenty-six thousand, eighty".