21452922650 has 24 divisors (see below), whose sum is σ = 39947810364. Its totient is φ = 8571411200.

The previous prime is 21452922643. The next prime is 21452922679. The reversal of 21452922650 is 5622925412.

It can be written as a sum of positive squares in 6 ways, for example, as 2242685449 + 19210237201 = 47357^2 + 138601^2 .

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, 199457 + ... + 287556.

Almost surely, 2^21452922650 is an apocalyptic number.

21452922650 is a deficient number, since it is larger than the sum of its proper divisors (18494887714).

21452922650 is a wasteful number, since it uses less digits than its factorization.

21452922650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487906 (or 487901 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 38.

The spelling of 21452922650 in words is "twenty-one billion, four hundred fifty-two million, nine hundred twenty-two thousand, six hundred fifty".