20357679280 has 80 divisors (see below), whose sum is σ = 47779308000. Its totient is φ = 8066355200.

The previous prime is 20357679271. The next prime is 20357679341. The reversal of 20357679280 is 8297675302.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4777791 + ... + 4782049.

It is an arithmetic number, because the mean of its divisors is an integer number (597241350).

Almost surely, 2^20357679280 is an apocalyptic number.

20357679280 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 20357679280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23889654000).

20357679280 is an abundant number, since it is smaller than the sum of its proper divisors (27421628720).

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

20357679280 is a wasteful number, since it uses less digits than its factorization.

20357679280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4822 (or 4816 counting only the distinct ones).

The product of its (nonzero) digits is 1270080, while the sum is 49.

The spelling of 20357679280 in words is "twenty billion, three hundred fifty-seven million, six hundred seventy-nine thousand, two hundred eighty".