20305532140 has 12 divisors (see below), whose sum is σ = 42641617536. Its totient is φ = 8122212848.

The previous prime is 20305532021. The next prime is 20305532141. The reversal of 20305532140 is 4123550302.

It is not an unprimeable number, because it can be changed into a prime (20305532141) 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, 507638284 + ... + 507638323.

It is an arithmetic number, because the mean of its divisors is an integer number (3553468128).

Almost surely, 2^20305532140 is an apocalyptic number.

20305532140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20305532140 is an abundant number, since it is smaller than the sum of its proper divisors (22336085396).

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

20305532140 is a wasteful number, since it uses less digits than its factorization.

20305532140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1015276616 (or 1015276614 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 25.

The spelling of 20305532140 in words is "twenty billion, three hundred five million, five hundred thirty-two thousand, one hundred forty".