21550654941 has 16 divisors (see below), whose sum is σ = 28966322880. Its totient is φ = 14251386240.

The previous prime is 21550654913. The next prime is 21550654949. The reversal of 21550654941 is 14945605512.

It is a happy number.

It is not a de Polignac number, because 21550654941 - 2⁷ = 21550654813 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21550654893 and 21550654902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21550654949) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 212475 + ... + 297063.

It is an arithmetic number, because the mean of its divisors is an integer number (1810395180).

Almost surely, 2^21550654941 is an apocalyptic number.

It is an amenable number.

21550654941 is a deficient number, since it is larger than the sum of its proper divisors (7415667939).

21550654941 is a wasteful number, since it uses less digits than its factorization.

21550654941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85276.

The product of its (nonzero) digits is 216000, while the sum is 42.

The spelling of 21550654941 in words is "twenty-one billion, five hundred fifty million, six hundred fifty-four thousand, nine hundred forty-one".