20421134332 has 12 divisors (see below), whose sum is σ = 37839160800. Its totient is φ = 9609945536.

The previous prime is 20421134323. The next prime is 20421134341. The reversal of 20421134332 is 23343112402.

It is an interprime number because it is at equal distance from previous prime (20421134323) and next prime (20421134341).

It is a junction number, because it is equal to n+sod(n) for n = 20421134297 and 20421134306.

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, 150155332 + ... + 150155467.

It is an arithmetic number, because the mean of its divisors is an integer number (3153263400).

Almost surely, 2^20421134332 is an apocalyptic number.

It is an amenable number.

20421134332 is a deficient number, since it is larger than the sum of its proper divisors (17418026468).

20421134332 is a wasteful number, since it uses less digits than its factorization.

20421134332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300310820 (or 300310818 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 20421134332 its reverse (23343112402), we get a palindrome (43764246734).

The spelling of 20421134332 in words is "twenty billion, four hundred twenty-one million, one hundred thirty-four thousand, three hundred thirty-two".