20002804780 has 24 divisors (see below), whose sum is σ = 48006731808. Its totient is φ = 6858104448.

The previous prime is 20002804753. The next prime is 20002804799. The reversal of 20002804780 is 8740820002.

It is a super-2 number, since 2×20002804780² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71438449 + ... + 71438728.

It is an arithmetic number, because the mean of its divisors is an integer number (2000280492).

Almost surely, 2^20002804780 is an apocalyptic number.

20002804780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20002804780 is an abundant number, since it is smaller than the sum of its proper divisors (28003927028).

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

20002804780 is a wasteful number, since it uses less digits than its factorization.

20002804780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142877193 (or 142877191 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 31.

The spelling of 20002804780 in words is "twenty billion, two million, eight hundred four thousand, seven hundred eighty".