21046712 has 8 divisors (see below), whose sum is σ = 39462600. Its totient is φ = 10523352.

The previous prime is 21046709. The next prime is 21046733. The reversal of 21046712 is 21764012.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1315412 + ... + 1315427.

It is an arithmetic number, because the mean of its divisors is an integer number (4932825).

Almost surely, 2^21046712 is an apocalyptic number.

It is an amenable number.

21046712 is a deficient number, since it is larger than the sum of its proper divisors (18415888).

21046712 is a wasteful number, since it uses less digits than its factorization.

21046712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2630845 (or 2630841 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 21046712 is about 4587.6695608991. The cubic root of 21046712 is about 276.0968294293.

The spelling of 21046712 in words is "twenty-one million, forty-six thousand, seven hundred twelve".