20308942080 has 360 divisors, whose sum is σ = 83053377792. Its totient is φ = 4641878016.

The previous prime is 20308942057. The next prime is 20308942081. The reversal of 20308942080 is 8024980302.

It is a tau number, because it is divible by the number of its divisors (360).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20308942081) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 711769 + ... + 739751.

Almost surely, 2^20308942080 is an apocalyptic number.

20308942080 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 20308942080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41526688896).

20308942080 is an abundant number, since it is smaller than the sum of its proper divisors (62744435712).

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

20308942080 is an equidigital number, since it uses as much as digits as its factorization.

20308942080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28023 (or 28000 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The spelling of 20308942080 in words is "twenty billion, three hundred eight million, nine hundred forty-two thousand, eighty".