20321010012 has 36 divisors (see below), whose sum is σ = 48994596168. Its totient is φ = 6555160800.

The previous prime is 20321009983. The next prime is 20321010013. The reversal of 20321010012 is 21001012302.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a self number, because there is not a number n which added to its sum of digits gives 20321010012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20321010013) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 869539 + ... + 892602.

Almost surely, 2^20321010012 is an apocalyptic number.

It is an amenable number.

20321010012 is an abundant number, since it is smaller than the sum of its proper divisors (28673586156).

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

20321010012 is a wasteful number, since it uses less digits than its factorization.

20321010012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1762210 (or 1762177 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 20321010012 its reverse (21001012302), we get a palindrome (41322022314).

The spelling of 20321010012 in words is "twenty billion, three hundred twenty-one million, ten thousand, twelve".