21867483940 has 24 divisors (see below), whose sum is σ = 45981464760. Its totient is φ = 8735612928.

The previous prime is 21867483929. The next prime is 21867483991. The reversal of 21867483940 is 4938476812.

It can be written as a sum of positive squares in 4 ways, for example, as 2827899684 + 19039584256 = 53178^2 + 137984^2 .

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 7 ways as a sum of consecutive naturals, for example, 695527 + ... + 726286.

It is an arithmetic number, because the mean of its divisors is an integer number (1915894365).

Almost surely, 2^21867483940 is an apocalyptic number.

21867483940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21867483940 is an abundant number, since it is smaller than the sum of its proper divisors (24113980820).

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

21867483940 is a wasteful number, since it uses less digits than its factorization.

21867483940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1422591 (or 1422589 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 52.

The spelling of 21867483940 in words is "twenty-one billion, eight hundred sixty-seven million, four hundred eighty-three thousand, nine hundred forty".