20797487466 has 16 divisors (see below), whose sum is σ = 47537114304. Its totient is φ = 5942139264.

The previous prime is 20797487453. The next prime is 20797487467. The reversal of 20797487466 is 66478479702.

It is not an unprimeable number, because it can be changed into a prime (20797487467) 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, 247589095 + ... + 247589178.

It is an arithmetic number, because the mean of its divisors is an integer number (2971069644).

Almost surely, 2^20797487466 is an apocalyptic number.

20797487466 is an abundant number, since it is smaller than the sum of its proper divisors (26739626838).

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

20797487466 is a wasteful number, since it uses less digits than its factorization.

20797487466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495178285.

The product of its (nonzero) digits is 28449792, while the sum is 60.

The spelling of 20797487466 in words is "twenty billion, seven hundred ninety-seven million, four hundred eighty-seven thousand, four hundred sixty-six".