20077180998 has 64 divisors (see below), whose sum is σ = 47013322752. Its totient is φ = 5596325280.

The previous prime is 20077180957. The next prime is 20077181011. The reversal of 20077180998 is 89908177002.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20077180998.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1639165 + ... + 1651367.

It is an arithmetic number, because the mean of its divisors is an integer number (734583168).

Almost surely, 2^20077180998 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20077180998, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23506661376).

20077180998 is an abundant number, since it is smaller than the sum of its proper divisors (26936141754).

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

20077180998 is a wasteful number, since it uses less digits than its factorization.

20077180998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13169.

The product of its (nonzero) digits is 508032, while the sum is 51.

The spelling of 20077180998 in words is "twenty billion, seventy-seven million, one hundred eighty thousand, nine hundred ninety-eight".