20311702236 has 72 divisors (see below), whose sum is σ = 60851539840. Its totient is φ = 5803341552.

The previous prime is 20311702217. The next prime is 20311702237. The reversal of 20311702236 is 63220711302.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20311702237) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1485826 + ... + 1499433.

Almost surely, 2^20311702236 is an apocalyptic number.

It is an amenable number.

20311702236 is an abundant number, since it is smaller than the sum of its proper divisors (40539837604).

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

20311702236 is a wasteful number, since it uses less digits than its factorization.

20311702236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2985285 (or 2985271 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The spelling of 20311702236 in words is "twenty billion, three hundred eleven million, seven hundred two thousand, two hundred thirty-six".