20347190680 has 64 divisors (see below), whose sum is σ = 46634616000. Its totient is φ = 7988496384.

The previous prime is 20347190641. The next prime is 20347190681. The reversal of 20347190680 is 8609174302.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20347190681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 466861 + ... + 508579.

It is an arithmetic number, because the mean of its divisors is an integer number (728665875).

Almost surely, 2^20347190680 is an apocalyptic number.

20347190680 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 20347190680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23317308000).

20347190680 is an abundant number, since it is smaller than the sum of its proper divisors (26287425320).

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

20347190680 is a wasteful number, since it uses less digits than its factorization.

20347190680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41956 (or 41952 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 40.

The spelling of 20347190680 in words is "twenty billion, three hundred forty-seven million, one hundred ninety thousand, six hundred eighty".