20468185720 has 32 divisors (see below), whose sum is σ = 46080148320. Its totient is φ = 8182522240.

The previous prime is 20468185709. The next prime is 20468185729. The reversal of 20468185720 is 2758186402.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20468185729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78316 + ... + 216955.

It is an arithmetic number, because the mean of its divisors is an integer number (1440004635).

Almost surely, 2^20468185720 is an apocalyptic number.

20468185720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20468185720 is an abundant number, since it is smaller than the sum of its proper divisors (25611962600).

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

20468185720 is a wasteful number, since it uses less digits than its factorization.

20468185720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297015 (or 297011 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 43.

The spelling of 20468185720 in words is "twenty billion, four hundred sixty-eight million, one hundred eighty-five thousand, seven hundred twenty".