21826657044 has 36 divisors (see below), whose sum is σ = 55239728544. Its totient is φ = 7266744912.

The previous prime is 21826656997. The next prime is 21826657091. The reversal of 21826657044 is 44075662812.

21826657044 is a `hidden beast` number, since 2 + 18 + 2 + 66 + 570 + 4 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (21826656997) and next prime (21826657091).

It is a tau number, because it is divible by the number of its divisors (36).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 336792 + ... + 396335.

It is an arithmetic number, because the mean of its divisors is an integer number (1534436904).

Almost surely, 2^21826657044 is an apocalyptic number.

It is an amenable number.

21826657044 is an abundant number, since it is smaller than the sum of its proper divisors (33413071500).

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

21826657044 is a wasteful number, since it uses less digits than its factorization.

21826657044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 733964 (or 733959 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The spelling of 21826657044 in words is "twenty-one billion, eight hundred twenty-six million, six hundred fifty-seven thousand, forty-four".