21053496 has 32 divisors (see below), whose sum is σ = 53020800. Its totient is φ = 6966240.

The previous prime is 21053491. The next prime is 21053503. The reversal of 21053496 is 69435012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21053491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181 + ... + 6491.

It is an arithmetic number, because the mean of its divisors is an integer number (1656900).

Almost surely, 2^21053496 is an apocalyptic number.

It is an amenable number.

21053496 is an abundant number, since it is smaller than the sum of its proper divisors (31967304).

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

21053496 is a wasteful number, since it uses less digits than its factorization.

21053496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6459 (or 6455 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 21053496 is about 4588.4088745446. The cubic root of 21053496 is about 276.1264910645.

The spelling of 21053496 in words is "twenty-one million, fifty-three thousand, four hundred ninety-six".