20508468460 has 12 divisors (see below), whose sum is σ = 43067783808. Its totient is φ = 8203387376.

The previous prime is 20508468457. The next prime is 20508468467. The reversal of 20508468460 is 6486480502.

It is not an unprimeable number, because it can be changed into a prime (20508468467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 512711692 + ... + 512711731.

It is an arithmetic number, because the mean of its divisors is an integer number (3588981984).

Almost surely, 2^20508468460 is an apocalyptic number.

20508468460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20508468460 is an abundant number, since it is smaller than the sum of its proper divisors (22559315348).

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

20508468460 is a wasteful number, since it uses less digits than its factorization.

20508468460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025423432 (or 1025423430 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 43.

The spelling of 20508468460 in words is "twenty billion, five hundred eight million, four hundred sixty-eight thousand, four hundred sixty".