20878467900 has 72 divisors (see below), whose sum is σ = 60424934640. Its totient is φ = 5566064640.

The previous prime is 20878467871. The next prime is 20878467917. The reversal of 20878467900 is 976487802.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 1465612 + ... + 1479788.

Almost surely, 2^20878467900 is an apocalyptic number.

20878467900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20878467900 is an abundant number, since it is smaller than the sum of its proper divisors (39546466740).

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

20878467900 is a wasteful number, since it uses less digits than its factorization.

20878467900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19103 (or 19096 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 51.

The spelling of 20878467900 in words is "twenty billion, eight hundred seventy-eight million, four hundred sixty-seven thousand, nine hundred".