20084387720 has 16 divisors (see below), whose sum is σ = 45189872460. Its totient is φ = 8033755072.

The previous prime is 20084387717. The next prime is 20084387723. The reversal of 20084387720 is 2778348002.

It is an interprime number because it is at equal distance from previous prime (20084387717) and next prime (20084387723).

It can be written as a sum of positive squares in 2 ways, for example, as 19779047044 + 305340676 = 140638^2 + 17474^2 .

It is not an unprimeable number, because it can be changed into a prime (20084387723) 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 3 ways as a sum of consecutive naturals, for example, 251054807 + ... + 251054886.

Almost surely, 2^20084387720 is an apocalyptic number.

20084387720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20084387720 is an abundant number, since it is smaller than the sum of its proper divisors (25105484740).

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

20084387720 is a wasteful number, since it uses less digits than its factorization.

20084387720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502109704 (or 502109700 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 41.

The spelling of 20084387720 in words is "twenty billion, eighty-four million, three hundred eighty-seven thousand, seven hundred twenty".