21485134 has 16 divisors (see below), whose sum is σ = 35555760. Its totient is φ = 9655360.

The previous prime is 21485129. The next prime is 21485147. The reversal of 21485134 is 43158412.

It is a super-2 number, since 2×21485134² = 923221965995912, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3529 + ... + 7444.

It is an arithmetic number, because the mean of its divisors is an integer number (2222235).

Almost surely, 2^21485134 is an apocalyptic number.

21485134 is a deficient number, since it is larger than the sum of its proper divisors (14070626).

21485134 is a wasteful number, since it uses less digits than its factorization.

21485134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11075.

The product of its digits is 3840, while the sum is 28.

The square root of 21485134 is about 4635.2059285430. The cubic root of 21485134 is about 278.0007849813. Note that the first 3 decimals are identical.

The spelling of 21485134 in words is "twenty-one million, four hundred eighty-five thousand, one hundred thirty-four".