20531010 has 32 divisors (see below), whose sum is σ = 50326272. Its totient is φ = 5358080.

The previous prime is 20530987. The next prime is 20531023. The reversal of 20531010 is 1013502.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5871 + ... + 8690.

It is an arithmetic number, because the mean of its divisors is an integer number (1572696).

Almost surely, 2^20531010 is an apocalyptic number.

20531010 is an abundant number, since it is smaller than the sum of its proper divisors (29795262).

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

20531010 is a wasteful number, since it uses less digits than its factorization.

20531010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14618.

The product of its (nonzero) digits is 30, while the sum is 12.

The square root of 20531010 is about 4531.1157566321. The cubic root of 20531010 is about 273.8231138500.

Adding to 20531010 its reverse (1013502), we get a palindrome (21544512).

The spelling of 20531010 in words is "twenty million, five hundred thirty-one thousand, ten".