20510423210 has 16 divisors (see below), whose sum is σ = 37245478536. Its totient is φ = 8131565568.

The previous prime is 20510423207. The next prime is 20510423233. The reversal of 20510423210 is 1232401502.

It can be written as a sum of positive squares in 4 ways, for example, as 8509878001 + 12000545209 = 92249^2 + 109547^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9074279 + ... + 9076538.

Almost surely, 2^20510423210 is an apocalyptic number.

20510423210 is a deficient number, since it is larger than the sum of its proper divisors (16735055326).

20510423210 is a wasteful number, since it uses less digits than its factorization.

20510423210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18150937.

The product of its (nonzero) digits is 480, while the sum is 20.

Adding to 20510423210 its reverse (1232401502), we get a palindrome (21742824712).

The spelling of 20510423210 in words is "twenty billion, five hundred ten million, four hundred twenty-three thousand, two hundred ten".