20543442032 has 10 divisors (see below), whose sum is σ = 39802918968. Its totient is φ = 10271721008.

The previous prime is 20543441981. The next prime is 20543442053. The reversal of 20543442032 is 23024434502.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20543441986 and 20543442004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 641982548 + ... + 641982579.

Almost surely, 2^20543442032 is an apocalyptic number.

It is an amenable number.

20543442032 is a deficient number, since it is larger than the sum of its proper divisors (19259476936).

20543442032 is a wasteful number, since it uses less digits than its factorization.

20543442032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1283965135 (or 1283965129 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 29.

Adding to 20543442032 its reverse (23024434502), we get a palindrome (43567876534).

The spelling of 20543442032 in words is "twenty billion, five hundred forty-three million, four hundred forty-two thousand, thirty-two".