20775442480 has 40 divisors (see below), whose sum is σ = 52018514352. Its totient is φ = 7670932224.

The previous prime is 20775442451. The next prime is 20775442481. The reversal of 20775442480 is 8424457702.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (20775442481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9987154 + ... + 9989233.

Almost surely, 2^20775442480 is an apocalyptic number.

20775442480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20775442480 is an abundant number, since it is smaller than the sum of its proper divisors (31243071872).

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

20775442480 is a wasteful number, since it uses less digits than its factorization.

20775442480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19976413 (or 19976407 counting only the distinct ones).

The product of its (nonzero) digits is 501760, while the sum is 43.

The spelling of 20775442480 in words is "twenty billion, seven hundred seventy-five million, four hundred forty-two thousand, four hundred eighty".