20513211124 has 24 divisors (see below), whose sum is σ = 41239005248. Its totient is φ = 8745822720.

The previous prime is 20513211079. The next prime is 20513211193. The reversal of 20513211124 is 42111231502.

It is a junction number, because it is equal to n+sod(n) for n = 20513211095 and 20513211104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1892562 + ... + 1903369.

Almost surely, 2^20513211124 is an apocalyptic number.

It is an amenable number.

20513211124 is an abundant number, since it is smaller than the sum of its proper divisors (20725794124).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20513211124 is a wasteful number, since it uses less digits than its factorization.

20513211124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3796135 (or 3796133 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

Adding to 20513211124 its reverse (42111231502), we get a palindrome (62624442626).

The spelling of 20513211124 in words is "twenty billion, five hundred thirteen million, two hundred eleven thousand, one hundred twenty-four".