21854863410 has 32 divisors (see below), whose sum is σ = 52455574080. Its totient is φ = 5827530048.

The previous prime is 21854863399. The next prime is 21854863469. The reversal of 21854863410 is 1436845812.

It is a happy 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, 726529 + ... + 756011.

It is an arithmetic number, because the mean of its divisors is an integer number (1639236690).

Almost surely, 2^21854863410 is an apocalyptic number.

21854863410 is an abundant number, since it is smaller than the sum of its proper divisors (30600710670).

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

21854863410 is a wasteful number, since it uses less digits than its factorization.

21854863410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54202.

The product of its (nonzero) digits is 184320, while the sum is 42.

The spelling of 21854863410 in words is "twenty-one billion, eight hundred fifty-four million, eight hundred sixty-three thousand, four hundred ten".