21873102678 has 32 divisors (see below), whose sum is σ = 55550737920. Its totient is φ = 6249457800.

The previous prime is 21873102653. The next prime is 21873102697. The reversal of 21873102678 is 87620137812.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28932298 + ... + 28933053.

It is an arithmetic number, because the mean of its divisors is an integer number (1735960560).

Almost surely, 2^21873102678 is an apocalyptic number.

21873102678 is an abundant number, since it is smaller than the sum of its proper divisors (33677635242).

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

21873102678 is a wasteful number, since it uses less digits than its factorization.

21873102678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57865369 (or 57865363 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The spelling of 21873102678 in words is "twenty-one billion, eight hundred seventy-three million, one hundred two thousand, six hundred seventy-eight".