20743680140 has 12 divisors (see below), whose sum is σ = 43561728336. Its totient is φ = 8297472048.

The previous prime is 20743680127. The next prime is 20743680203. The reversal of 20743680140 is 4108634702.

It is a self number, because there is not a number n which added to its sum of digits gives 20743680140.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 518591984 + ... + 518592023.

It is an arithmetic number, because the mean of its divisors is an integer number (3630144028).

Almost surely, 2^20743680140 is an apocalyptic number.

20743680140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20743680140 is an abundant number, since it is smaller than the sum of its proper divisors (22818048196).

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

20743680140 is a wasteful number, since it uses less digits than its factorization.

20743680140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1037184016 (or 1037184014 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 35.

The spelling of 20743680140 in words is "twenty billion, seven hundred forty-three million, six hundred eighty thousand, one hundred forty".