21878485050 has 24 divisors (see below), whose sum is σ = 54258643296. Its totient is φ = 5834262640.

The previous prime is 21878485049. The next prime is 21878485091. The reversal of 21878485050 is 5058487812.

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, 72928134 + ... + 72928433.

It is an arithmetic number, because the mean of its divisors is an integer number (2260776804).

Almost surely, 2^21878485050 is an apocalyptic number.

21878485050 is an abundant number, since it is smaller than the sum of its proper divisors (32380158246).

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

21878485050 is a wasteful number, since it uses less digits than its factorization.

21878485050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145856582 (or 145856577 counting only the distinct ones).

The product of its (nonzero) digits is 716800, while the sum is 48.

The spelling of 21878485050 in words is "twenty-one billion, eight hundred seventy-eight million, four hundred eighty-five thousand, fifty".