21879046600 has 48 divisors (see below), whose sum is σ = 51828596820. Its totient is φ = 8586489600.

The previous prime is 21879046577. The next prime is 21879046621. The reversal of 21879046600 is 664097812.

It can be written as a sum of positive squares in 6 ways, for example, as 4456630564 + 17422416036 = 66758^2 + 131994^2 .

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

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, 1021431 + ... + 1042630.

Almost surely, 2^21879046600 is an apocalyptic number.

21879046600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21879046600 is an abundant number, since it is smaller than the sum of its proper divisors (29949550220).

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

21879046600 is a wasteful number, since it uses less digits than its factorization.

21879046600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2064130 (or 2064121 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 43.

The spelling of 21879046600 in words is "twenty-one billion, eight hundred seventy-nine million, forty-six thousand, six hundred".