20431012212 has 96 divisors (see below), whose sum is σ = 57460771200. Its totient is φ = 6240519936.

The previous prime is 20431012201. The next prime is 20431012223. The reversal of 20431012212 is 21221013402.

It is a happy number.

20431012212 is a `hidden beast` number, since 20 + 431 + 0 + 1 + 2 + 212 = 666.

It is an interprime number because it is at equal distance from previous prime (20431012201) and next prime (20431012223).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 139239 + ... + 245457.

It is an arithmetic number, because the mean of its divisors is an integer number (598549700).

Almost surely, 2^20431012212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20431012212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28730385600).

20431012212 is an abundant number, since it is smaller than the sum of its proper divisors (37029758988).

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

20431012212 is a wasteful number, since it uses less digits than its factorization.

20431012212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106382 (or 106374 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 20431012212 its reverse (21221013402), we get a palindrome (41652025614).

The spelling of 20431012212 in words is "twenty billion, four hundred thirty-one million, twelve thousand, two hundred twelve".