21650552010 has 24 divisors (see below), whose sum is σ = 56291435460. Its totient is φ = 5773480512.

The previous prime is 21650551991. The next prime is 21650552029. The reversal of 21650552010 is 1025505612.

21650552010 is a `hidden beast` number, since 2 + 1 + 650 + 5 + 5 + 2 + 0 + 1 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (21650551991) and next prime (21650552029).

It can be written as a sum of positive squares in 2 ways, for example, as 21269013921 + 381538089 = 145839^2 + 19533^2 .

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, 120280755 + ... + 120280934.

Almost surely, 2^21650552010 is an apocalyptic number.

21650552010 is an abundant number, since it is smaller than the sum of its proper divisors (34640883450).

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

21650552010 is a wasteful number, since it uses less digits than its factorization.

21650552010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240561702 (or 240561699 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The spelling of 21650552010 in words is "twenty-one billion, six hundred fifty million, five hundred fifty-two thousand, ten".