21224525850 has 96 divisors (see below), whose sum is σ = 63802255680. Its totient is φ = 5145336000.

The previous prime is 21224525837. The next prime is 21224525863. The reversal of 21224525850 is 5852542212.

21224525850 is a `hidden beast` number, since 2 + 1 + 2 + 24 + 52 + 585 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (21224525837) and next prime (21224525863).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 699781 + ... + 729480.

It is an arithmetic number, because the mean of its divisors is an integer number (664606830).

Almost surely, 2^21224525850 is an apocalyptic number.

21224525850 is an abundant number, since it is smaller than the sum of its proper divisors (42577729830).

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

21224525850 is a wasteful number, since it uses less digits than its factorization.

21224525850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1429293 (or 1429282 counting only the distinct ones).

The product of its (nonzero) digits is 64000, while the sum is 36.

The spelling of 21224525850 in words is "twenty-one billion, two hundred twenty-four million, five hundred twenty-five thousand, eight hundred fifty".