21487096 has 8 divisors (see below), whose sum is σ = 40288320. Its totient is φ = 10743544.

The previous prime is 21487093. The next prime is 21487111. The reversal of 21487096 is 69078412.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21487093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1342936 + ... + 1342951.

It is an arithmetic number, because the mean of its divisors is an integer number (5036040).

Almost surely, 2^21487096 is an apocalyptic number.

It is an amenable number.

21487096 is a deficient number, since it is larger than the sum of its proper divisors (18801224).

21487096 is a wasteful number, since it uses less digits than its factorization.

21487096 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2685893 (or 2685889 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 21487096 is about 4635.4175647939. The cubic root of 21487096 is about 278.0092469709.

The spelling of 21487096 in words is "twenty-one million, four hundred eighty-seven thousand, ninety-six".