21862651104 has 144 divisors (see below), whose sum is σ = 74143060992. Its totient is φ = 5974873344.

The previous prime is 21862651099. The next prime is 21862651133. The reversal of 21862651104 is 40115626812.

It is a happy number.

21862651104 is a `hidden beast` number, since 2 + 18 + 626 + 5 + 1 + 10 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 189384 + ... + 282119.

It is an arithmetic number, because the mean of its divisors is an integer number (514882368).

Almost surely, 2^21862651104 is an apocalyptic number.

21862651104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21862651104 is an abundant number, since it is smaller than the sum of its proper divisors (52280409888).

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

21862651104 is a wasteful number, since it uses less digits than its factorization.

21862651104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471549 (or 471538 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The spelling of 21862651104 in words is "twenty-one billion, eight hundred sixty-two million, six hundred fifty-one thousand, one hundred four".