20311222232 has 32 divisors (see below), whose sum is σ = 43574937120. Its totient is φ = 8694631680.

The previous prime is 20311222223. The next prime is 20311222307. The reversal of 20311222232 is 23222211302.

It is a happy number.

It is a congruent number.

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, 163619 + ... + 259602.

It is an arithmetic number, because the mean of its divisors is an integer number (1361716785).

Almost surely, 2^20311222232 is an apocalyptic number.

It is an amenable number.

20311222232 is an abundant number, since it is smaller than the sum of its proper divisors (23263714888).

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

20311222232 is a wasteful number, since it uses less digits than its factorization.

20311222232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424091 (or 424087 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 20311222232 its reverse (23222211302), we get a palindrome (43533433534).

The spelling of 20311222232 in words is "twenty billion, three hundred eleven million, two hundred twenty-two thousand, two hundred thirty-two".