20311332132 has 96 divisors (see below), whose sum is σ = 58439497984. Its totient is φ = 5346777600.

The previous prime is 20311332121. The next prime is 20311332143. The reversal of 20311332132 is 23123311302.

It is an interprime number because it is at equal distance from previous prime (20311332121) and next prime (20311332143).

It is a super-3 number, since 3×20311332132³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 20311332099 and 20311332108.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 573582 + ... + 607962.

Almost surely, 2^20311332132 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 20311332132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29219748992).

20311332132 is an abundant number, since it is smaller than the sum of its proper divisors (38128165852).

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

20311332132 is a wasteful number, since it uses less digits than its factorization.

20311332132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34949 (or 34947 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 20311332132 its reverse (23123311302), we get a palindrome (43434643434).

The spelling of 20311332132 in words is "twenty billion, three hundred eleven million, three hundred thirty-two thousand, one hundred thirty-two".