20280008000 has 112 divisors (see below), whose sum is σ = 57398375424. Its totient is φ = 6953126400.

The previous prime is 20280007997. The next prime is 20280008011. The reversal of 20280008000 is 80008202.

It is a tau number, because it is divible by the number of its divisors (112).

It is a super-2 number, since 2×20280008000² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

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, 125072 + ... + 237071.

Almost surely, 2^20280008000 is an apocalyptic number.

20280008000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20280008000 is an abundant number, since it is smaller than the sum of its proper divisors (37118367424).

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

20280008000 is an equidigital number, since it uses as much as digits as its factorization.

20280008000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362177 (or 362157 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

The spelling of 20280008000 in words is "twenty billion, two hundred eighty million, eight thousand".