20369773680 has 160 divisors (see below), whose sum is σ = 65269822464. Its totient is φ = 5252072448.

The previous prime is 20369773667. The next prime is 20369773687. The reversal of 20369773680 is 8637796302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20369773687) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 925362 + ... + 947118.

Almost surely, 2^20369773680 is an apocalyptic number.

20369773680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20369773680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32634911232).

20369773680 is an abundant number, since it is smaller than the sum of its proper divisors (44900048784).

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

20369773680 is a wasteful number, since it uses less digits than its factorization.

20369773680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21903 (or 21897 counting only the distinct ones).

The product of its (nonzero) digits is 2286144, while the sum is 51.

The spelling of 20369773680 in words is "twenty billion, three hundred sixty-nine million, seven hundred seventy-three thousand, six hundred eighty".