21376044 has 36 divisors (see below), whose sum is σ = 54578160. Its totient is φ = 7053600.

The previous prime is 21376037. The next prime is 21376049. The reversal of 21376044 is 44067312.

21376044 is a `hidden beast` number, since 21 + 37 + 604 + 4 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 21375999 and 21376017.

It is not an unprimeable number, because it can be changed into a prime (21376049) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 697 + ... + 6575.

It is an arithmetic number, because the mean of its divisors is an integer number (1516060).

Almost surely, 2^21376044 is an apocalyptic number.

It is an amenable number.

21376044 is an abundant number, since it is smaller than the sum of its proper divisors (33202116).

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

21376044 is a wasteful number, since it uses less digits than its factorization.

21376044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5990 (or 5985 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 21376044 is about 4623.4234069572. The cubic root of 21376044 is about 277.5294733730.

The spelling of 21376044 in words is "twenty-one million, three hundred seventy-six thousand, forty-four".