21741486 has 32 divisors (see below), whose sum is σ = 48867840. Its totient is φ = 6398304.

The previous prime is 21741481. The next prime is 21741493. The reversal of 21741486 is 68414712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21741481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4266 + ... + 7853.

It is an arithmetic number, because the mean of its divisors is an integer number (1527120).

Almost surely, 2^21741486 is an apocalyptic number.

21741486 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

21741486 is an abundant number, since it is smaller than the sum of its proper divisors (27126354).

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

21741486 is a wasteful number, since it uses less digits than its factorization.

21741486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12160.

The product of its digits is 10752, while the sum is 33.

The square root of 21741486 is about 4662.7766405866. The cubic root of 21741486 is about 279.1020810667.

The spelling of 21741486 in words is "twenty-one million, seven hundred forty-one thousand, four hundred eighty-six".