21412556650 has 24 divisors (see below), whose sum is σ = 39895259040. Its totient is φ = 8550419760.

The previous prime is 21412556591. The next prime is 21412556653. The reversal of 21412556650 is 5665521412.

It is not an unprimeable number, because it can be changed into a prime (21412556653) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 335430 + ... + 394129.

It is an arithmetic number, because the mean of its divisors is an integer number (1662302460).

Almost surely, 2^21412556650 is an apocalyptic number.

21412556650 is a deficient number, since it is larger than the sum of its proper divisors (18482702390).

21412556650 is a wasteful number, since it uses less digits than its factorization.

21412556650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 730158 (or 730153 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 37.

The spelling of 21412556650 in words is "twenty-one billion, four hundred twelve million, five hundred fifty-six thousand, six hundred fifty".