21550210094 has 12 divisors (see below), whose sum is σ = 37602917784. Its totient is φ = 9235804284.

The previous prime is 21550210091. The next prime is 21550210133. The reversal of 21550210094 is 49001205512.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21550210091) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 109949954 + ... + 109950149.

It is an arithmetic number, because the mean of its divisors is an integer number (3133576482).

Almost surely, 2^21550210094 is an apocalyptic number.

21550210094 is a deficient number, since it is larger than the sum of its proper divisors (16052707690).

21550210094 is a wasteful number, since it uses less digits than its factorization.

21550210094 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219900119 (or 219900112 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 29.

The spelling of 21550210094 in words is "twenty-one billion, five hundred fifty million, two hundred ten thousand, ninety-four".