20678234280 has 256 divisors, whose sum is σ = 71424460800. Its totient is φ = 4736517120.

The previous prime is 20678234251. The next prime is 20678234309. The reversal of 20678234280 is 8243287602.

It is an interprime number because it is at equal distance from previous prime (20678234251) and next prime (20678234309).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12213114 + ... + 12214806.

It is an arithmetic number, because the mean of its divisors is an integer number (279001800).

Almost surely, 2^20678234280 is an apocalyptic number.

20678234280 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 20678234280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35712230400).

20678234280 is an abundant number, since it is smaller than the sum of its proper divisors (50746226520).

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

20678234280 is a wasteful number, since it uses less digits than its factorization.

20678234280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2224 (or 2220 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 42.

The spelling of 20678234280 in words is "twenty billion, six hundred seventy-eight million, two hundred thirty-four thousand, two hundred eighty".