21741004 has 6 divisors (see below), whose sum is σ = 38046764. Its totient is φ = 10870500.

The previous prime is 21741001. The next prime is 21741019. The reversal of 21741004 is 40014712.

It is not an unprimeable number, because it can be changed into a prime (21741001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2717622 + ... + 2717629.

Almost surely, 2^21741004 is an apocalyptic number.

It is an amenable number.

21741004 is a deficient number, since it is larger than the sum of its proper divisors (16305760).

21741004 is a wasteful number, since it uses less digits than its factorization.

21741004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5435255 (or 5435253 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 21741004 is about 4662.7249543588. The cubic root of 21741004 is about 279.1000185245.

Adding to 21741004 its reverse (40014712), we get a palindrome (61755716).

The spelling of 21741004 in words is "twenty-one million, seven hundred forty-one thousand, four".