21010498 has 16 divisors (see below), whose sum is σ = 32659200. Its totient is φ = 10126800.

The previous prime is 21010489. The next prime is 21010501. The reversal of 21010498 is 89401012.

It is a happy number.

It is an unprimeable number.

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, 21153 + ... + 22123.

It is an arithmetic number, because the mean of its divisors is an integer number (2041200).

Almost surely, 2^21010498 is an apocalyptic number.

21010498 is a deficient number, since it is larger than the sum of its proper divisors (11648702).

21010498 is a wasteful number, since it uses less digits than its factorization.

21010498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1353.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 21010498 is about 4583.7209775465. The cubic root of 21010498 is about 275.9383832906.

The spelling of 21010498 in words is "twenty-one million, ten thousand, four hundred ninety-eight".