20130311332 has 12 divisors (see below), whose sum is σ = 35235674460. Its totient is φ = 10062975776.

The previous prime is 20130311329. The next prime is 20130311339. The reversal of 20130311332 is 23311303102.

It can be written as a sum of positive squares in 2 ways, for example, as 5748065856 + 14382245476 = 75816^2 + 119926^2 .

It is a super-2 number, since 2×20130311332² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20130311339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 524107 + ... + 561202.

It is an arithmetic number, because the mean of its divisors is an integer number (2936306205).

Almost surely, 2^20130311332 is an apocalyptic number.

It is an amenable number.

20130311332 is a deficient number, since it is larger than the sum of its proper divisors (15105363128).

20130311332 is a wasteful number, since it uses less digits than its factorization.

20130311332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1089950 (or 1089948 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 20130311332 its reverse (23311303102), we get a palindrome (43441614434).

The spelling of 20130311332 in words is "twenty billion, one hundred thirty million, three hundred eleven thousand, three hundred thirty-two".