20178807628 has 48 divisors (see below), whose sum is σ = 43725394944. Its totient is φ = 7950055680.

The previous prime is 20178807589. The next prime is 20178807629. The reversal of 20178807628 is 82670887102.

It is not an unprimeable number, because it can be changed into a prime (20178807629) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 472468 + ... + 513403.

It is an arithmetic number, because the mean of its divisors is an integer number (910945728).

Almost surely, 2^20178807628 is an apocalyptic number.

20178807628 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20178807628 is an abundant number, since it is smaller than the sum of its proper divisors (23546587316).

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

20178807628 is a wasteful number, since it uses less digits than its factorization.

20178807628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 985942 (or 985940 counting only the distinct ones).

The product of its (nonzero) digits is 602112, while the sum is 49.

The spelling of 20178807628 in words is "twenty billion, one hundred seventy-eight million, eight hundred seven thousand, six hundred twenty-eight".