20045487900 has 36 divisors (see below), whose sum is σ = 57998279192. Its totient is φ = 5345463360.

The previous prime is 20045487883. The next prime is 20045487923. The reversal of 20045487900 is 978454002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33408847 + ... + 33409446.

Almost surely, 2^20045487900 is an apocalyptic number.

20045487900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20045487900 is an abundant number, since it is smaller than the sum of its proper divisors (37952791292).

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

20045487900 is a wasteful number, since it uses less digits than its factorization.

20045487900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66818310 (or 66818303 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

The spelling of 20045487900 in words is "twenty billion, forty-five million, four hundred eighty-seven thousand, nine hundred".