20312103210 has 32 divisors (see below), whose sum is σ = 55713197952. Its totient is φ = 4642766400.

The previous prime is 20312103187. The next prime is 20312103271. The reversal of 20312103210 is 1230121302.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20312103210.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48361941 + ... + 48362360.

It is an arithmetic number, because the mean of its divisors is an integer number (1741037436).

Almost surely, 2^20312103210 is an apocalyptic number.

20312103210 is an abundant number, since it is smaller than the sum of its proper divisors (35401094742).

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

20312103210 is a wasteful number, since it uses less digits than its factorization.

20312103210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96724318.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 20312103210 its reverse (1230121302), we get a palindrome (21542224512).

The spelling of 20312103210 in words is "twenty billion, three hundred twelve million, one hundred three thousand, two hundred ten".