10020491 has 8 divisors (see below), whose sum is σ = 10940160. Its totient is φ = 9122112.

The previous prime is 10020487. The next prime is 10020499. The reversal of 10020491 is 19402001.

It is a happy number.

10020491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10020491 - 2² = 10020487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10020499) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4331 + ... + 6228.

It is an arithmetic number, because the mean of its divisors is an integer number (1367520).

Almost surely, 2^10020491 is an apocalyptic number.

10020491 is a deficient number, since it is larger than the sum of its proper divisors (919669).

10020491 is a wasteful number, since it uses less digits than its factorization.

10020491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10645.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 10020491 is about 3165.5159137177. The cubic root of 10020491 is about 215.5905236764.

Adding to 10020491 its reverse (19402001), we get a palindrome (29422492).

The spelling of 10020491 in words is "ten million, twenty thousand, four hundred ninety-one".