20887229500 has 48 divisors (see below), whose sum is σ = 45966080160. Its totient is φ = 8291088000.

The previous prime is 20887229483. The next prime is 20887229509. The reversal of 20887229500 is 592278802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20887229509) 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, 93945 + ... + 224944.

It is an arithmetic number, because the mean of its divisors is an integer number (957626670).

Almost surely, 2^20887229500 is an apocalyptic number.

20887229500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20887229500 is an abundant number, since it is smaller than the sum of its proper divisors (25078850660).

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

20887229500 is a wasteful number, since it uses less digits than its factorization.

20887229500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319039 (or 319027 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 43.

The spelling of 20887229500 in words is "twenty billion, eight hundred eighty-seven million, two hundred twenty-nine thousand, five hundred".