20643011551132 has 12 divisors (see below), whose sum is σ = 36125338414480. Its totient is φ = 10321486289856.

The previous prime is 20643011551087. The next prime is 20643011551163. The reversal of 20643011551132 is 23115511034602.

It is a super-2 number, since 2×20643011551132² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2341848 + ... + 6838879.

Almost surely, 2^{20643011551132} is an apocalyptic number.

It is an amenable number.

20643011551132 is a deficient number, since it is larger than the sum of its proper divisors (15482326863348).

20643011551132 is a wasteful number, since it uses less digits than its factorization.

20643011551132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9742860 (or 9742858 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 34.

Adding to 20643011551132 its reverse (23115511034602), we get a palindrome (43758522585734).

The spelling of 20643011551132 in words is "twenty trillion, six hundred forty-three billion, eleven million, five hundred fifty-one thousand, one hundred thirty-two".