20827474440 has 64 divisors (see below), whose sum is σ = 62493249600. Its totient is φ = 5553030912.

The previous prime is 20827474387. The next prime is 20827474477. The reversal of 20827474440 is 4447472802.

It is a junction number, because it is equal to n+sod(n) for n = 20827474392 and 20827474401.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 923539 + ... + 945821.

It is an arithmetic number, because the mean of its divisors is an integer number (976457025).

Almost surely, 2^20827474440 is an apocalyptic number.

20827474440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20827474440 is an abundant number, since it is smaller than the sum of its proper divisors (41665775160).

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

20827474440 is a wasteful number, since it uses less digits than its factorization.

20827474440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30086 (or 30082 counting only the distinct ones).

The product of its (nonzero) digits is 401408, while the sum is 42.

The spelling of 20827474440 in words is "twenty billion, eight hundred twenty-seven million, four hundred seventy-four thousand, four hundred forty".