20511351332 has 12 divisors (see below), whose sum is σ = 37455511296. Its totient is φ = 9809776680.

The previous prime is 20511351319. The next prime is 20511351389. The reversal of 20511351332 is 23315311502.

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 3 ways as a sum of consecutive naturals, for example, 111474644 + ... + 111474827.

It is an arithmetic number, because the mean of its divisors is an integer number (3121292608).

Almost surely, 2^20511351332 is an apocalyptic number.

It is an amenable number.

20511351332 is a deficient number, since it is larger than the sum of its proper divisors (16944159964).

20511351332 is a wasteful number, since it uses less digits than its factorization.

20511351332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222949498 (or 222949496 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 26.

Adding to 20511351332 its reverse (23315311502), we get a palindrome (43826662834).

The spelling of 20511351332 in words is "twenty billion, five hundred eleven million, three hundred fifty-one thousand, three hundred thirty-two".