20490529 has 8 divisors (see below), whose sum is σ = 21288960. Its totient is φ = 19706400.

The previous prime is 20490527. The next prime is 20490551. The reversal of 20490529 is 92509402.

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 20490529 - 2¹ = 20490527 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20490529.

It is not an unprimeable number, because it can be changed into a prime (20490527) 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, 609 + ... + 6430.

It is an arithmetic number, because the mean of its divisors is an integer number (2661120).

Almost surely, 2^20490529 is an apocalyptic number.

It is an amenable number.

20490529 is a deficient number, since it is larger than the sum of its proper divisors (798431).

20490529 is an equidigital number, since it uses as much as digits as its factorization.

20490529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7151.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 20490529 is about 4526.6465512562. The cubic root of 20490529 is about 273.6430297292.

The spelling of 20490529 in words is "twenty million, four hundred ninety thousand, five hundred twenty-nine".