21550662 has 48 divisors (see below), whose sum is σ = 56508192. Its totient is φ = 5794560.

The previous prime is 21550657. The next prime is 21550667. The reversal of 21550662 is 26605512.

It is an interprime number because it is at equal distance from previous prime (21550657) and next prime (21550667).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21550667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2889 + ... + 7172.

It is an arithmetic number, because the mean of its divisors is an integer number (1177254).

Almost surely, 2^21550662 is an apocalyptic number.

21550662 is an abundant number, since it is smaller than the sum of its proper divisors (34957530).

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

21550662 is a wasteful number, since it uses less digits than its factorization.

21550662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10093 (or 10090 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 21550662 is about 4642.2690572607. The cubic root of 21550662 is about 278.2831251143.

The spelling of 21550662 in words is "twenty-one million, five hundred fifty thousand, six hundred sixty-two".